add python script to create a new repo on all onion remotes

[milahu]

fix

$ git push righttoprivacy.onion
remote: Push to create is not enabled for users.
fatal: unable to access 'http://gg6zxtreajiijztyy5g6bt5o6l3qu32nrg7eulyemlhxwwl6enk6ghad.onion/$owner/$repo': The requested URL returned error: 403

solution concept

• use an already running tor proxy on localhost
• sign in with username and password from ~/.git-credentials
• open {base_url}/repo/create
• enter repo name and hit "create repo"

similar: piratebay-uploader

bonus points for creating a fork repo from an existing upstream repo
identified by a common root commit?
no, search by commit hash fails (expected result)
gitea currently does not support "search repos by commit hash"