Eliminate duplicate universal_func_type and generalize parameter extractor functions

[glwagner]

This PR eliminates the duplicate universal_func_type by properly extending UniversalFunctions.universal_func_type within the Parameters submodule.

It also generalizes the parameter extractor functions to make it easier to build user-defined AbstractSurfaceFluxesParameters.

Closes #145

[codecov]

Codecov Report

Attention: Patch coverage is 15.38462% with 11 lines in your changes missing coverage. Please review.

Project coverage is 90.05%. Comparing base (4f06b46) to head (4f222bf).
Report is 25 commits behind head on main.

Files	Patch %	Lines
src/Parameters.jl	15.38%	11 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #149   +/-   ##
=======================================
  Coverage   90.05%   90.05%           
=======================================
  Files           4        4           
  Lines         835      835           
=======================================
  Hits          752      752           
  Misses         83       83           

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