I've successfully implemented the tool changes recommended by @nikhilmaddirala to break up the single github_search tool into modular tools.

Examine current server code and GitHub search implementation
Create modular tools: nixos_github_search, homemanager_github_search, darwin_github_search
Follow project's async architecture and plain text output requirements
Test the implementation
Commit and push changes

I've implemented three modular GitHub search tools as requested:

nixos_github_search - Searches NixOS GitHub organization and related repositories
homemanager_github_search - Searches nix-community Home Manager repositories
darwin_github_search - Searches nix-darwin repositories and macOS Nix content

Each tool supports:

The tools follow the project's patterns:

Feature: tools to search discussions #36

Description