feat(vcs): multiple repositories

[m-aciek]

Very early work in progress.

Proposed changes

#7271

Checklist

• Lint and unit tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added documentation to describe my feature.
• I have squashed my commits into logic units.
• I have described the changes in the commit messages.

Other information

[codecov]

Codecov Report

Attention: Patch coverage is 58.53659% with 17 lines in your changes missing coverage. Please review.

Project coverage is 90.56%. Comparing base (6aee586) to head (4f206a6).
Report is 2591 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11844      +/-   ##
==========================================
- Coverage   90.82%   90.56%   -0.26%     
==========================================
  Files         554      577      +23     
  Lines       57306    58745    +1439     
  Branches     9122     9391     +269     
==========================================
+ Hits        52046    53204    +1158     
- Misses       3640     3843     +203     
- Partials     1620     1698      +78     

Files	Coverage Δ
weblate/trans/forms.py	87.76% <ø> (-0.10%)	⬇️
weblate/vcs/models.py	85.29% <ø> (-9.00%)	⬇️
weblate/vcs/multiple.py	58.53% <58.53%> (ø)

... and 322 files with indirect coverage changes

[github-actions]

This pull request has been automatically marked as stale because there wasn’t any recent activity.

It will be closed soon if no further action occurs.

Thank you for your contributions!