Generate README.md for examples (#484)

Co-authored-by: theguild-bot <[email protected]>

Author: enisdenjo

examples/apq-subgraphs/README.md

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+# apq-subgraphs
+
+## How to open in CodeSandbox?
+
+This example is available online as a [CodeSandbox Devbox](https://codesandbox.io/docs/learn/devboxes/overview).
+
+Visit [githubbox.com/graphql-hive/gateway/tree/main/examples/apq-subgraphs](https://githubbox.com/graphql-hive/gateway/tree/main/examples/apq-subgraphs).
+
+ℹ️ You can open an example from other branches by changing the `/tree/main` to the branch name (`/tree/<branch_name>`) in the URL above.
+
+## How to run locally?
+
+1. Download example
+   ```sh
+   curl -L https://github.com/graphql-hive/gateway/raw/refs/heads/main/examples/apq-subgraphs/example.tar.gz | tar -x
+   ```
+
+   ℹ️ You can download examples from other branches by changing the `/refs/heads/main` to the branch name (`/refs/heads/<branch_name>`) in the URL above.
+
+1. Open example
+   ```sh
+   cd apq-subgraphs
+   ```
+1. Install
+   ```sh
+   npm i
+   ```
+1. Start service greetings
+   ```sh
+   npm run service:greetings
+   ```
+1. Compose
+   ```sh
+   npm run compose
+   ```
+1. Start the gateway
+   ```sh
+   npm run gateway
+   ```
+
+🚀 Then visit [localhost:4000/graphql](http://localhost:4000/graphql) to see Hive Gateway in action!
+
+## Note
+
+This example was auto-generated from the [apq-subgraphs E2E test](/e2e/apq-subgraphs) using our [example converter](/internal/examples).
+
+You can browse the [apq-subgraphs.e2e.ts test file](/e2e/apq-subgraphs/apq-subgraphs.e2e.ts) to understand what to expect.

examples/apq-subgraphs/example.tar.gz

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+# extra-fields
+
+## How to open in CodeSandbox?
+
+This example is available online as a [CodeSandbox Devbox](https://codesandbox.io/docs/learn/devboxes/overview).
+
+Visit [githubbox.com/graphql-hive/gateway/tree/main/examples/extra-fields](https://githubbox.com/graphql-hive/gateway/tree/main/examples/extra-fields).
+
+ℹ️ You can open an example from other branches by changing the `/tree/main` to the branch name (`/tree/<branch_name>`) in the URL above.
+
+## How to run locally?
+
+1. Download example
+   ```sh
+   curl -L https://github.com/graphql-hive/gateway/raw/refs/heads/main/examples/extra-fields/example.tar.gz | tar -x
+   ```
+
+   ℹ️ You can download examples from other branches by changing the `/refs/heads/main` to the branch name (`/refs/heads/<branch_name>`) in the URL above.
+
+1. Open example
+   ```sh
+   cd extra-fields
+   ```
+1. Install
+   ```sh
+   npm i
+   ```
+1. Start service foo
+   ```sh
+   npm run service:foo
+   ```
+1. Start service bar
+   ```sh
+   npm run service:bar
+   ```
+1. Compose
+   ```sh
+   npm run compose
+   ```
+1. Start the gateway
+   ```sh
+   npm run gateway
+   ```
+
+🚀 Then visit [localhost:4000/graphql](http://localhost:4000/graphql) to see Hive Gateway in action!
+
+## Note
+
+This example was auto-generated from the [extra-fields E2E test](/e2e/extra-fields) using our [example converter](/internal/examples).
+
+You can browse the [extra-fields.e2e.ts test file](/e2e/extra-fields/extra-fields.e2e.ts) to understand what to expect.

examples/extra-fields/README.md

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+# federation-example
+
+## How to open in CodeSandbox?
+
+This example is available online as a [CodeSandbox Devbox](https://codesandbox.io/docs/learn/devboxes/overview).
+
+Visit [githubbox.com/graphql-hive/gateway/tree/main/examples/federation-example](https://githubbox.com/graphql-hive/gateway/tree/main/examples/federation-example).
+
+ℹ️ You can open an example from other branches by changing the `/tree/main` to the branch name (`/tree/<branch_name>`) in the URL above.
+
+## How to run locally?
+
+1. Download example
+   ```sh
+   curl -L https://github.com/graphql-hive/gateway/raw/refs/heads/main/examples/federation-example/example.tar.gz | tar -x
+   ```
+
+   ℹ️ You can download examples from other branches by changing the `/refs/heads/main` to the branch name (`/refs/heads/<branch_name>`) in the URL above.
+
+1. Open example
+   ```sh
+   cd federation-example
+   ```
+1. Install
+   ```sh
+   npm i
+   ```
+1. Start service accounts
+   ```sh
+   npm run service:accounts
+   ```
+1. Start service inventory
+   ```sh
+   npm run service:inventory
+   ```
+1. Start service products
+   ```sh
+   npm run service:products
+   ```
+1. Start service reviews
+   ```sh
+   npm run service:reviews
+   ```
+1. Compose
+   ```sh
+   npm run compose
+   ```
+1. Start the gateway
+   ```sh
+   npm run gateway
+   ```
+
+🚀 Then visit [localhost:4000/graphql](http://localhost:4000/graphql) to see Hive Gateway in action!
+
+## Note
+
+This example was auto-generated from the [federation-example E2E test](/e2e/federation-example) using our [example converter](/internal/examples).
+
+You can browse the [federation-example.e2e.ts test file](/e2e/federation-example/federation-example.e2e.ts) to understand what to expect.

examples/extra-fields/example.tar.gz

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+# federation-mixed
+
+## How to open in CodeSandbox?
+
+This example is available online as a [CodeSandbox Devbox](https://codesandbox.io/docs/learn/devboxes/overview).
+
+Visit [githubbox.com/graphql-hive/gateway/tree/main/examples/federation-mixed](https://githubbox.com/graphql-hive/gateway/tree/main/examples/federation-mixed).
+
+ℹ️ You can open an example from other branches by changing the `/tree/main` to the branch name (`/tree/<branch_name>`) in the URL above.
+
+## How to run locally?
+
+1. Download example
+   ```sh
+   curl -L https://github.com/graphql-hive/gateway/raw/refs/heads/main/examples/federation-mixed/example.tar.gz | tar -x
+   ```
+
+   ℹ️ You can download examples from other branches by changing the `/refs/heads/main` to the branch name (`/refs/heads/<branch_name>`) in the URL above.
+
+1. Open example
+   ```sh
+   cd federation-mixed
+   ```
+1. Install
+   ```sh
+   npm i
+   ```
+1. Start service accounts
+   ```sh
+   npm run service:accounts
+   ```
+1. Start service inventory
+   ```sh
+   npm run service:inventory
+   ```
+1. Start service products
+   ```sh
+   npm run service:products
+   ```
+1. Start service reviews
+   ```sh
+   npm run service:reviews
+   ```
+1. Compose
+   ```sh
+   npm run compose
+   ```
+1. Start the gateway
+   ```sh
+   npm run gateway
+   ```
+
+🚀 Then visit [localhost:4000/graphql](http://localhost:4000/graphql) to see Hive Gateway in action!
+
+## Note
+
+This example was auto-generated from the [federation-mixed E2E test](/e2e/federation-mixed) using our [example converter](/internal/examples).
+
+You can browse the [federation-mixed.e2e.ts test file](/e2e/federation-mixed/federation-mixed.e2e.ts) to understand what to expect.

examples/federation-example/README.md

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+# federation-subscriptions-passthrough
+
+## How to open in CodeSandbox?
+
+This example is available online as a [CodeSandbox Devbox](https://codesandbox.io/docs/learn/devboxes/overview).
+
+Visit [githubbox.com/graphql-hive/gateway/tree/main/examples/federation-subscriptions-passthrough](https://githubbox.com/graphql-hive/gateway/tree/main/examples/federation-subscriptions-passthrough).
+
+ℹ️ You can open an example from other branches by changing the `/tree/main` to the branch name (`/tree/<branch_name>`) in the URL above.
+
+## How to run locally?
+
+1. Download example
+   ```sh
+   curl -L https://github.com/graphql-hive/gateway/raw/refs/heads/main/examples/federation-subscriptions-passthrough/example.tar.gz | tar -x
+   ```
+
+   ℹ️ You can download examples from other branches by changing the `/refs/heads/main` to the branch name (`/refs/heads/<branch_name>`) in the URL above.
+
+1. Open example
+   ```sh
+   cd federation-subscriptions-passthrough
+   ```
+1. Install
+   ```sh
+   npm i
+   ```
+1. Start service products
+   ```sh
+   npm run service:products
+   ```
+1. Start service reviews
+   ```sh
+   npm run service:reviews
+   ```
+1. Compose
+   ```sh
+   npm run compose
+   ```
+1. Start the gateway
+   ```sh
+   npm run gateway
+   ```
+
+🚀 Then visit [localhost:4000/graphql](http://localhost:4000/graphql) to see Hive Gateway in action!
+
+## Note
+
+This example was auto-generated from the [federation-subscriptions-passthrough E2E test](/e2e/federation-subscriptions-passthrough) using our [example converter](/internal/examples).
+
+You can browse the [federation-subscriptions-passthrough.e2e.ts test file](/e2e/federation-subscriptions-passthrough/federation-subscriptions-passthrough.e2e.ts) to understand what to expect.