[ENH] Add dataset generators

[adam2392]

Towards: #152

Changes proposed in this pull request:

• Add methods to generate different datasets for regression, classification and hypothesis testing
• adds the quadratic simulator from Samba's power simulation
• adds multi view data generating models

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[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (e4728fa) 89.06% compared to head (9e4d02f) 89.59%.

❗ Current head 9e4d02f differs from pull request most recent head a670446. Consider uploading reports for the commit a670446 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #169      +/-   ##
==========================================
+ Coverage   89.06%   89.59%   +0.52%     
==========================================
  Files          41       46       +5     
  Lines        3531     3710     +179     
==========================================
+ Hits         3145     3324     +179     
  Misses        386      386              

Files	Coverage Δ
sktree/datasets/__init__.py	100.00% <100.00%> (ø)
sktree/datasets/hyppo.py	100.00% <100.00%> (ø)
sktree/datasets/tests/test_hyppo.py	100.00% <100.00%> (ø)
sktree/datasets/tests/test_multiview.py	100.00% <100.00%> (ø)
sktree/stats/tests/test_coleman.py	100.00% <ø> (ø)
sktree/datasets/multiview.py	96.77% <96.77%> (ø)

... and 1 file with indirect coverage changes

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