RFE: add support for Codeberg git repos

[HamishB]

Feature description

Hi, could we please have support for pulling from Codeberg.org git repos? It's similar to github and gitlab et al. but is a non-profit that specializes in FOSS software. Supporting a 100% FOSS toolchain in our FOSS software development is IMO a good thing.

It's basically the same web API as the others, the repository_handler/codeberg_handler.py file just needs to read like https://codeberg.org/%s/%s/raw/master/%s. (that expands to /raw/branch/master/ in a redirect if it matters)

Here's a target to test with:
https://codeberg.org/HamishB/geology_symbols

many thanks,
Hamish

Additional context

No response

[HamishB]

Also, I see some mention of OSGeo's git repo in tests/qgis/test_handler_remote_git.py. Any idea what the status of that is?

(I'm mirroring the Codeberg repo at https://git.osgeo.org/gitea/hamish/geology_symbols)