ENH: config setup and RF search space

[adamovanja]

this PR:

• adds option of defining search space to investigate for specific model type via configuration
• adjusts RF search space for slightly less overfitting
• adds max_layers as configurable hyperparameter for NNs

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 3 lines in your changes missing coverage. Please review.

Project coverage is 59.15%. Comparing base (d66b0a1) to head (0a76d85).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
q2_ritme/tune_models.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
+ Coverage   58.46%   59.15%   +0.69%     
==========================================
  Files          17       17              
  Lines        1093     1119      +26     
  Branches      153      154       +1     
==========================================
+ Hits          639      662      +23     
- Misses        437      440       +3     
  Partials       17       17              

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