mcp-nixos MCP Server

From the README

# MCP-NixOS - Because Your AI Shouldn't Hallucinate Package Names

## Quick Start

**🚨 No Nix/NixOS Required!** Works on any system - Windows, macOS, Linux. You're just querying APIs.

### Option 1: uvx (Recommended)

```json
{
  "mcpServers": {
    "nixos": {
      "command": "uvx",
      "args": ["mcp-nixos"]
    }
  }
}
```

### Option 2: Nix

```json
{
  "mcpServers": {
    "nixos": {
      "command": "nix",
      "args": ["run", "github:utensils/mcp-nixos", "--"]
    }
  }
}
```

### Option 3: Docker

```json
{
  "mcpServers": {
    "nixos": {
      "command": "docker",
      "args": ["run", "--rm", "-i", "ghcr.io/utensils/mcp-nixos"]
    }
  }
}
```

Your AI now has access to real NixOS data instead of making things up. You're welcome.

### Option 4: HTTP (Remote MCP)

FastMCP supports running this server over HTTP at a URL (the MCP endpoint defaults to `/mcp`).

```bash
# Run an HTTP MCP server at http://127.0.0.1:8000/mcp
MCP_NIXOS_TRANSPORT=http MCP_NIXOS_HOST=127.0.0.1 MCP_N