This test exercises the "go_file_metadata" MCP tool.

-- flags --
-mcp

-- settings.json --
{
    "mcpTools": {
        "go_file_metadata": true
    }
}
-- go.mod --
module example.com/cmd

go 1.21

-- main.go --
package main

//@mcptool("go_file_metadata", `{"file":"$WORKDIR/main.go"}`, output=metadata)

func main() {

}
-- @metadata --
File `$WORKDIR/main.go` is in package "example.com/cmd", which has the following files:
	$WORKDIR/main.go
