Enable the selection with predefined data points for `MaxMin`

[FanwangM]

The original implementation does not support initial data points but only the medoid. Now we support

• an integer
• an float
• None, which uses the medoid
• a list of integer or float numbers or a mixture of both

This is achieved by having a shared function called setup_reference_index.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.87500% with 2 lines in your changes missing coverage. Please review.

Project coverage is 96.58%. Comparing base (d931154) to head (c17cfc6). Report is 26 commits behind head on main.

Files with missing lines	Patch %	Lines
selector/methods/distance.py	96.87%	2 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #248      +/-   ##
==========================================
+ Coverage   96.00%   96.58%   +0.58%     
==========================================
  Files           9        9              
  Lines         975      997      +22     
==========================================
+ Hits          936      963      +27     
+ Misses         39       34       -5     

Files with missing lines	Coverage Δ
selector/methods/distance.py	96.73% <96.87%> (+4.13%)	:arrow_up:

... and 1 file with indirect coverage changes