P3 shedding!

[rorlija1]

• This PR implements shedding for P3 liquid mass content as described in Cholette (2019).
• See liquid fraction issue for the parameterization, or the docs build!
• I have not added any plots to the docs, but I could see it being interesting to plot shedding as a function of L_p3_tot keeping L_ice and N_ice constant and increasing L_liq for a few different F_rim values. Maybe I will try to do that this week.
• TODO - Once get_ice_bound() is merged, change the code in src accordingly, and test away!
• Finally, for catching cases when we have no particles over which to compute shedding, I have currently implemented to compute shedding if L > eps && N > eps but am unsure whether the condition should be that or L > eps || N > eps.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.92%. Comparing base (9582b2d) to head (4d08bee).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #452      +/-   ##
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+ Coverage   96.89%   96.92%   +0.03%     
==========================================
  Files          41       41              
  Lines        1480     1497      +17     
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+ Hits         1434     1451      +17     
  Misses         46       46              

Components	Coverage Δ
src	98.78% <100.00%> (+0.01%)	⬆️
ext	69.79% <ø> (ø)