MAINT Remove irrelevant files

[adam2392]

Reference Issues/PRs

What does this implement/fix? Explain your changes.

Remove irrelevant code.
Clean up file names.
Separate code into different files based on functionality

Any other comments?

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 6 lines in your changes missing coverage. Please review.

Project coverage is 80.00%. Comparing base (e8c7de5) to head (f1f4ae2).
Report is 3 commits behind head on main.

Files	Patch %	Lines
treeple/stats/forest.py	90.32%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #312      +/-   ##
==========================================
+ Coverage   78.66%   80.00%   +1.34%     
==========================================
  Files          24       24              
  Lines        2264     2221      -43     
  Branches      417      411       -6     
==========================================
- Hits         1781     1777       -4     
+ Misses        352      312      -40     
- Partials      131      132       +1     

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