Fix method error when has_condensate has integer 0 input

[tapios]

Adds a method to eps_numerics to avoid method errors when, for example, relative_humidity is called without condensate arguments, leading to default q_liq = q_ice = 0 (integer). This led to errors from has_condensate because the epsilon type inference was integer.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.46%. Comparing base (50cde14) to head (898874a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #299      +/-   ##
==========================================
+ Coverage   86.45%   86.46%   +0.01%     
==========================================
  Files          22       22              
  Lines        1115     1116       +1     
==========================================
+ Hits          964      965       +1     
  Misses        151      151              

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[szy21]

This is fine, but should we make the defaults FT(0) instead of Integer 0? Is it possible?

[tapios]

This is fine, but should we make the defaults FT(0) instead of Integer 0? Is it possible?

It's what @dennisYatunin said we should do to handle type promotion and duals seemlessly. I'll leave it for now.