feat: Update MCP tool response format, remove urls tool

[ka2n]

• test: use embedded resource
• feat(mcp): remove fetch_library_urls and update fetch_library_docs response format

[Copilot]

Pull Request Overview

This PR removes the deprecated "fetch_library_urls" tool and updates the response format for the "fetch_library_docs" tool to use resource objects instead of plain text.

• Removed the SearchURLs function and its corresponding import and tool registration.
• Updated the fetch_library_docs response format to return resource objects for various document types (README, documentation, homepage, registry, repository).
• Removed the "fetch_library_urls" tool reference from the README.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
mcp/tools.go	Removed the obsolete fetch_library_urls tool and updated the response format of fetch_library_docs to use mcp.NewToolResultResource.
README.md	Removed the reference to the now-deleted fetch_library_urls tool.

[Copilot]

Pull Request Overview

This PR removes the outdated fetch_library_urls tool and enhances the fetch_library_docs tool by updating its response format and improving its descriptions. Key changes include the deletion of the fetch_library_urls functionality in mcp/tools.go, updating the fetch_library_docs tool to use resource-based results, and updating the README.md to remove the obsolete tool reference.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
mcp/tools.go	Removed fetch_library_urls and updated fetch_library_docs response format and descriptions.
README.md	Removed the reference to the fetch_library_urls tool.