GitRoot must be a gomodule provider

To be able to make a (timy)go plugin dev will need access to libs/golang.

So we need to create a plugin which transform GitRoot in a gomodule provider by following:

• https://sagikazarmark.hu/blog/vanity-import-paths-in-go/
• https://docs.google.com/document/d/1jVFkZTcYbNLaTxXD9OcGfn7vYv5hWtPx9–lTx1gPMs/edit?tab=t.0