Porting Aurora objects

[kujaku11]

Moving generic function from Aurora to mtpy.processing and building helper classes to process data.

• RunSummary
• KernelDataset
• ProcessingBase
• AuroraProcessing
• Add tests
• Add documentation

[codecov]

Codecov Report

Attention: Patch coverage is 50.75188% with 131 lines in your changes missing coverage. Please review.

Project coverage is 31.35%. Comparing base (6ff4d65) to head (6318876).
Report is 69 commits behind head on updates.

Files	Patch %	Lines
mtpy/processing/aurora/process_aurora.py	55.00%	72 Missing ⚠️
mtpy/modeling/structured_mesh_3d.py	6.97%	40 Missing ⚠️
mtpy/core/mt_stations.py	7.14%	13 Missing ⚠️
mtpy/processing/base.py	84.61%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           updates      #45      +/-   ##
===========================================
+ Coverage    28.32%   31.35%   +3.03%     
===========================================
  Files          132      142      +10     
  Lines        22148    23407    +1259     
===========================================
+ Hits          6273     7339    +1066     
- Misses       15875    16068     +193     

Flag	Coverage Δ
tests	31.35% <50.75%> (+3.03%)	⬆️

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