[WIP] Fix merge conflicts in repos tools refactor

[Copilot]

• [x] Understand the PR and merge conflict context
• [ ] Migrate consolidated tools from mark3labs/mcp-go to modelcontextprotocol/go-sdk
  • [ ] Migrate pkg/github/repositories.go (CommitRead, TagRead, FileWrite consolidated tools)
  • [ ] Migrate pkg/github/releases.go (ReleaseRead consolidated tool)
  • [ ] Migrate pkg/github/stargazers.go (moved from repositories.go)
• [ ] Update tests for migrated tools
• [ ] Update tool snapshots
• [ ] Ensure code builds and tests pass
• [ ] Update PR description if necessary

Original prompt

https://github.com/github/github-mcp-server/pull/1283

Refactors and consolidates the repos tools

A new pr changed a fundamental underlying library. Just fix the mergeconflicts for me

Also update the tests, the snaps and the PR description if necessary.

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