Update branch URL logic in conf.py

[izmalk]

Fixed #98 and a few other potential bugs.
Refactored the variables for branch selection in URLs.
Updated both conf.py and default-conf.py.

[Copilot]

Pull request overview

This PR updates how the documentation configuration and theme construct GitHub URLs so that links (license, view source, edit source) can target the appropriate branch/tag instead of being hardcoded to main, addressing issue #98.

Changes:

• Introduced repo_default_branch and computed source_branch (via READTHEDOCS_GIT_IDENTIFIER fallback) to drive GitHub link generation.
• Updated license, default edit, and default view URLs in docs/conf.py and docs/default-conf.py to use source_branch.
• Updated the feedback template to use repo_branch for view/edit URLs.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
ulwazi/theme/ulwazi/sections/feedback.html	Switches view/edit URL construction to use repo_branch.
docs/default-conf.py	Makes license and default view/edit URLs branch-aware via source_branch and exposes it as repo_branch.
docs/conf.py	Same branch-aware URL refactor for this repo’s docs build configuration.

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