limactl-mcp: write_file doesn't not create the directory

[jandubois]

You can only write to directories that already exist:

$ echo '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"write_file","arguments":{"path":"/tmp/foo","content":"x"}}}' >&"${MCP[1]}"

$ read -t 1 -r line <&"${MCP[0]}"; jq . <<<"$line"
{
  "jsonrpc": "2.0",
  "id": 3,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "{}"
      }
    ],
    "structuredContent": {}
  }
}

$ echo '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"write_file","arguments":{"path":"/tmp/bar/baz","content":"x"}}}' >&"${MCP[1]}"

$ read -t 1 -r line <&"${MCP[0]}"; jq . <<<"$line"
{
  "jsonrpc": "2.0",
  "id": 3,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "file does not exist"
      }
    ],
    "isError": true
  }
}