feat(github): Add GitHub Search to Github MCP

[0xRaduan]

Description

Added comprehensive search functionality to the GitHub MCP Server, enabling users to search for code, issues/PRs, and users across GitHub. This enhancement brings powerful GitHub search capabilities directly to MCP clients.

Server Details

• Server: github
• Changes to: tools (added search functionality), schemas (added search schemas), documentation

Motivation and Context

GitHub's search functionality is a crucial feature for developers and AI assistants working with codebases. This addition allows MCP clients to:

• Search code across repositories with language and path filters
• Find relevant issues and pull requests
• Discover users and organizations
• Use GitHub's advanced search syntax
• Sort and paginate results efficiently

How Has This Been Tested?

• Tested with Claude Desktop client
  
• Verified search functionality works through stdio interface
• Tested various search scenarios:
  • Code search with language and path filters
  • Issues search with labels and state filters
  • User search with location and follower filters

Breaking Changes

No breaking changes. Users can continue using existing functionality without modification. The new search features are purely additive.

Types of changes

• New MCP Server
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My server follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally(there are no tests)
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

• Added comprehensive documentation for search query syntax in README
• Included detailed schema descriptions and JSDoc comments
• Implemented proper type safety with Zod schemas
• Version bumped from 0.5.1 to 0.6.0 for new feature addition

[0xRaduan]

@maheshmurag / @jspahrsummers - please let me know if anything else is needed