Add .gitea directory to the release_* branch

[elsylambert]

GWA should copy the .gitea directory in a repo to the release branch if it exists so workflows get triggered when a release is made with that branch.

for the workflow files to be copied in GWE, note that it is .gitea directory with a dot in front, and we should copy those every time to the newrelease_* branch, all the files in .gitea/workflows/* in case we have updates since their last release. We'd put updates in their master branch.