feat(common): Add Git SHA to footer

[liammulh]

Issue

#52

Description

Adds the shortened Git SHA to the footer of every page.

Checklist

• The implementation focuses on a single change.
• The commit for this PR has tests that demonstrate the implementation works.
• The documentation has been updated to reflect the changes in this PR.
• The commit for this PR contains a link to the issue thread for this PR.

[codecov]

Codecov Report

❌ Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92.92%. Comparing base (5b9c915) to head (2822ae2).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/config/settings/base.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
- Coverage   92.94%   92.92%   -0.02%     
==========================================
  Files          66       67       +1     
  Lines        3131     3140       +9     
==========================================
+ Hits         2910     2918       +8     
- Misses        221      222       +1     

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