Support setting model for each command

[XInTheDark]

Support setting a default model for each command. This includes built-in commands and custom AI commands.

[Copilot]

Pull Request Overview

This PR introduces support for configuring a specific model for each command, including both built-in and custom AI commands. The changes add a new model property to command configuration objects and update various components and API functions to account for the new command-specific model setting.

• Added a new "commandId" parameter to many commands.
• Extended command configuration objects with a "model" property.
• Updated UI components and API calls to select and display the appropriate model.

Reviewed Changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/improve.jsx	Added the commandId for the "improve" command.
src/helpers/customCommands.jsx	Extended the CustomCommand constructor with a new model property.
src/helpers/commandsHelper.js	Minor updates to support command configuration.
src/friendly.jsx, src/format.jsx, src/fixCode.jsx, src/explain.jsx, src/continue.jsx, src/askAboutSelectedText.jsx, src/askAboutBrowserTab.jsx, src/askAI.jsx	Consistently added commandId for individual commands.
src/customAICommands.jsx	Added model handling and updated the UI form to configure a command’s model.
src/components/preferences/options/generalOptions.jsx, src/components/preferences/options/commandOptions.jsx	Introduced UI changes to enable selection of the model for commands.
src/components/preferences/base/valueDropdown.jsx, src/components/preferences/base/optionsComponent.jsx	Adjusted usage of the dropdownComponent to accommodate its invocation.
src/api/providers.js, src/api/gpt.jsx	Updated provider logic to use command-specific configuration when available.
src/aiChat.jsx	Revised description text to reflect the new focus on the model setting.

Comments suppressed due to low confidence (2)

src/components/preferences/base/valueDropdown.jsx:45

• Ensure that dropdownComponent is always a function; if there is a possibility it might not be, add a check or refactor its usage to avoid runtime errors.

{dropdownComponent()}

src/customAICommands.jsx:208

• [nitpick] Consider using an empty array instead of null for allowedProviders when no model is specified to maintain consistent data types for downstream processing.

allowedProviders: command.model ? [command.model] : null,