Add ion temp class

[chris-ashe]

This PR introduces a new explicit class for the ion temperature profile IonTemperatureProfile. This moves all existing ion temperature function and calculations into the class. This also created a new ion temperature profile array as part of PlasmaProfile that can be called for function use instead of having to always multiply the electron profile by the scaling constant. New explicitly variables for the ion and electron temperatures at the pedestals and separatrix's have also been made.

Variable Renaming and Standardization:

• Renamed all instances of temp_plasma_pedestal_kev and temp_plasma_separatrix_kev to temp_plasma_pedestal_electron_kev and temp_plasma_separatrix_electron_kev in code, input handling, validation, and plotting routines for improved clarity and consistency.

• Updated variable mapping for obsolete and legacy variable names to point to the new standardized names.

Documentation and Input File Updates:

• Updated documentation and input parameter tables to use the new variable names, and clarified the distinction between electron and ion temperature profiles.

• Modified all relevant example input files to use the new variable names.

Plotting and Output Enhancements:

• Enhanced temperature profile plotting to use the new variable names and improved the displayed labels to include both electron and ion temperatures for greater clarity.

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 65.11628% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.91%. Comparing base (4171d8d) to head (8810217).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
process/core/io/plot/summary.py	0.00%	6 Missing ⚠️
process/models/physics/plasma_profiles.py	44.44%	5 Missing ⚠️
process/models/physics/physics.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4598      +/-   ##
==========================================
+ Coverage   49.88%   49.91%   +0.03%     
==========================================
  Files         151      151              
  Lines       30071    30081      +10     
==========================================
+ Hits        15000    15015      +15     
+ Misses      15071    15066       -5     

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[timothy-nunn]

Is this self.data.physics.f_temp_plasma_ion_electron?

[chris-ashe]

Good spot, yes that should just be self.data.physics.f_temp_plasma_ion_electron. It will give the same value but now makes all the calcs consistent