Migrating framegrab MCP Server

[timmarkhuff]

This PR migrates code from https://github.com/groundlight/framegrab-mcp-server, so that Framegrab and Groundlight can run together seamlessly.

I haven't been able to get framegrab to run within a dockerfile on my machine for some reason, even with network=host, privileged=true, etc. So I have been simply configuring my MCP sever to run like this in Claude Desktop:

{
  "mcpServers": {
    "groundlight": {
      "command": "uv",
      "args": [
        "run", 
        "--directory", 
        "C:/Users/tim/git/groundlight-mcp-server",
        "groundlight-mcp-server"
      ],
      "env": {
        "GROUNDLIGHT_API_TOKEN": "api_xxx"
      }
    }
  }
}

This is similar to how the Framegrab MCP server was run, so perhaps this is fine.

I added a tool that will capture an image from a specified framegrabber and submit it to a detector. Previously it was not possible to send images captured by a framegrabber to Groundlight; you could only submit image URLs.