Compile Refactor

[jessegrabowski]

Refactor the initial building of the model object to make the code a bit more clear.

• Divide responsibility for parsing and compiling
• Move each backend's compilation logic to its own file

Also installs versioneer for setting up a release pipeline

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Codecov Report

Attention: Patch coverage is 75.14170% with 307 lines in your changes missing coverage. Please review.

Project coverage is 68.30%. Comparing base (51096e4) to head (fa429ae).
Report is 3 commits behind head on main.

Files	Patch %	Lines
cge_modeling/_version.py	42.61%	206 Missing ⚠️
cge_modeling/tools/sympy_tools.py	12.82%	34 Missing ⚠️
cge_modeling/base/function_wrappers.py	69.86%	22 Missing ⚠️
cge_modeling/compile/sympytensor.py	85.27%	19 Missing ⚠️
cge_modeling/compile/pytensor.py	94.26%	9 Missing ⚠️
cge_modeling/base/build.py	84.44%	7 Missing ⚠️
cge_modeling/base/cge.py	76.66%	7 Missing ⚠️
cge_modeling/base/utilities.py	85.71%	1 Missing ⚠️
cge_modeling/compile/numba.py	98.91%	1 Missing ⚠️
cge_modeling/compile/pytensor_tools.py	97.91%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
- Coverage   68.93%   68.30%   -0.63%     
==========================================
  Files          17       24       +7     
  Lines        2707     3155     +448     
==========================================
+ Hits         1866     2155     +289     
- Misses        841     1000     +159     

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