Update README.md

Adding links to builder and user docs

README.md

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 # blackbeard-extension
 
-Blackbeard is a basic example of a [GitHub Copilot Extension](https://docs.github.com/en/copilot/using-github-copilot/using-extensions-to-integrate-external-tools-with-copilot-chat). It responds to messages like a pirate, using Copilot's LLM API and special system prompts. This repository should serve as an example of the building blocks of a Copilot Extension. See [index.js](/index.js) for the main logic.
+Blackbeard is a basic example of a GitHub Copilot Extension. It responds to messages like a pirate, using Copilot's LLM API and special system prompts. This repository should serve as an example of the building blocks of a Copilot Extension. See [index.js](/index.js) for the main logic.
 
 > [!NOTE]
 > Copilot Extensions are in public beta and may be subject to change.
 > 
 > All enrolled users with a GitHub Copilot Individual subscription can use Copilot Extensions.
 > For organizations and enterprises with a Copilot Business or Copilot Enterprise subscription, organization owners and enterprise administrators can grant access to Copilot Extensions for use within their company.
 
+**Documentation:**
+- [Using Copilot Extensions](https://docs.github.com/en/copilot/using-github-copilot/using-extensions-to-integrate-external-tools-with-copilot-chat)
+- [About building Copilot Extensions](https://docs.github.com/en/copilot/building-copilot-extensions/about-building-copilot-extensions)
+- [Set up process](https://docs.github.com/en/copilot/building-copilot-extensions/setting-up-copilot-extensions)
+- [Communicating with the Copilot platform](https://docs.github.com/en/copilot/building-copilot-extensions/building-a-copilot-agent-for-your-copilot-extension/configuring-your-copilot-agent-to-communicate-with-the-copilot-platform)
+- [Communicating with GitHub](https://docs.github.com/en/copilot/building-copilot-extensions/building-a-copilot-agent-for-your-copilot-extension/configuring-your-copilot-agent-to-communicate-with-github)
+
 ## Development
 
 Install dependencies: