docs: Add README

README.md

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+# LabMCP
+
+A collection of Model Context Protocol (MCP) servers written in Go.
+
+## NixOS Options MCP Server
+
+Search and query NixOS configuration options across multiple nixpkgs revisions.
+
+**Features:**
+- Search options with fuzzy matching
+- Query specific options with full metadata
+- Index multiple nixpkgs revisions
+- Fetch nixpkgs module source files
+- Support for PostgreSQL and SQLite
+
+## Status
+
+🚧 **In Development** - Not yet functional
+
+## Documentation
+
+- See [TODO.md](TODO.md) for implementation progress
+- See [CLAUDE.md](CLAUDE.md) for architecture and design decisions