🚧 Implement new suite of bootstrap current scalings

[chris-ashe]

Description

Checklist

I confirm that I have completed the following checks:

• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 15.45455% with 93 lines in your changes missing coverage. Please review.

Project coverage is 27.95%. Comparing base (b68ac63) to head (9e57e4c).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
process/io/plot_proc.py	1.92%	51 Missing ⚠️
process/physics.py	26.31%	42 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3355      +/-   ##
==========================================
+ Coverage   27.11%   27.95%   +0.83%     
==========================================
  Files          76       76              
  Lines       17736    18879    +1143     
==========================================
+ Hits         4810     5278     +468     
- Misses      12926    13601     +675     

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