Setup manual release pipeline

[another-rex]

Setup a manual release pipeline and convert the old pipeline back to listening on tag pushes. Fixes #632.

This pipeline allows us to manually run all the pre-release checks before we manually push the tags.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8c5634d) 78.50% compared to head (eb439aa) 78.93%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #681      +/-   ##
==========================================
+ Coverage   78.50%   78.93%   +0.43%     
==========================================
  Files          82       84       +2     
  Lines        5890     5935      +45     
==========================================
+ Hits         4624     4685      +61     
+ Misses       1068     1048      -20     
- Partials      198      202       +4     

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