add detailed func commands reference link in the readme for better user experience (knative#3245)

Signed-off-by: RayyanSeliya <[email protected]>

Author: RayyanSeliya

README.md

@@ -12,6 +12,10 @@
 [Try the QuickStart](https://knative.dev/docs/getting-started/about-knative-functions/)
 [Read the Documentation](https://knative.dev/docs/functions/)
 
+## Command Reference
+
+For detailed documentation on all available `func` commands, including usage examples and options, see the [Command Reference Documentation](docs/reference/). This reference covers all commands from creating and deploying functions to managing configurations and repositories.
+
 ## Roadmap
 
 We use GitHub issues and project to track our roadmap. Please see our roadmap [here](https://github.com/orgs/knative/projects/49).