add costing docs for evaporator, compressor, heat exchanger, heater/c…

[ElmiraShamlou]

Addresses #1360 for :

• evaporator
• compressor
• heat exchanger
• heater/chiller
• membrane distillation

Legal Acknowledgement

By contributing to this software project, I agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the license terms described in the LICENSE.txt file at the top level of this directory.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[MarcusHolly]

LGTM - just a couple of minor comments about indices and references.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.94%. Comparing base (deafb8f) to head (f42549c).
Report is 32 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1442   +/-   ##
=======================================
  Coverage   93.94%   93.94%           
=======================================
  Files         310      310           
  Lines       33206    33206           
=======================================
  Hits        31194    31194           
  Misses       2012     2012           

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[MarcusHolly]

Some of the files still have the "Estimated from multiple sources" under the reference section

[MarcusHolly]

LGTM

[adam-a-a]

Great job!