Start implementing stacks

[opatiny]

• feat: basic Stack API
• feat(Stack): implement constructor
• feat(Stack): implement functions to get values
• feat(Stack): implement minImage
• feat(Stack): implement maxImage
• feat(Stack): implement iterator
• test(Stack): add min and max image tests
• feat(Stack): implement getStackFromFolder for debug
• fix(Stack): enhance Stack properties
• feat(Stack): implement map and filter
• feat(Stack): implement meanImage
• feat(Stack): implement medianImage
• test: enhance stack coverage

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (70e18b0) 98.58% compared to head (5446426) 98.61%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #416      +/-   ##
==========================================
+ Coverage   98.58%   98.61%   +0.03%     
==========================================
  Files         224      232       +8     
  Lines        5850     5986     +136     
  Branches     1238     1249      +11     
==========================================
+ Hits         5767     5903     +136     
  Misses         80       80              
  Partials        3        3              

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