Average bulk microphysics tendencies

[sajjadazimi]

Purpose

Add average bulk microphyiscs 1m tendency based on linearized microphysics:

• Transfers → D * q_donor
• Vapor sources → constants
• Sinks → -D * q (exponential decay over time);

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• I have read and checked the items on the review checklist.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.52%. Comparing base (91a04fe) to head (707ee19).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #711      +/-   ##
==========================================
+ Coverage   92.01%   92.52%   +0.50%     
==========================================
  Files          54       54              
  Lines        2242     2394     +152     
==========================================
+ Hits         2063     2215     +152     
  Misses        179      179              

Components	Coverage Δ
src	93.47% <100.00%> (+0.46%)	⬆️
ext	69.47% <ø> (ø)

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[trontrytel]

Hitting approve, so I don't slow you down when away!