Bump minimum sphinxcontrib-mermaid, add sphinx-reredirects

[timkpaine]

No description provided.

[github-actions]

Test Results

2 tests  ±0   2 ✅ ±0   9s ⏱️ ±0s
1 suites ±0   0 💤 ±0 
1 files   ±0   0 ❌ ±0 

Results for commit 2897137. ± Comparison against base commit 080f769.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.42%. Comparing base (080f769) to head (2897137).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #65   +/-   ##
=======================================
  Coverage   76.42%   76.42%           
=======================================
  Files           5        5           
  Lines         123      123           
  Branches       21       21           
=======================================
  Hits           94       94           
  Misses         19       19           
  Partials       10       10           

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