FD from EVT theory using Block Maxima approach

[PythagoreanCult]

Added the Block Maxima approach to compute dimensions using estimates of the parameters of a GEV distribution

[Datseris]

(please title your pull requests accordingly, and add more extensive descriptions in the Pull Request message)

[codecov-commenter]

Codecov Report

Merging #28 (182d717) into main (b752dd0) will decrease coverage by 3.63%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main      #28      +/-   ##
==========================================
- Coverage   92.17%   88.54%   -3.63%     
==========================================
  Files          17       18       +1     
  Lines         677      707      +30     
==========================================
+ Hits          624      626       +2     
- Misses         53       81      +28     

Files Changed	Coverage Δ
src/extremes_based/extremesdim.jl	65.85% <0.00%> (-18.53%)	:arrow_down:
src/extremes_based/gev.jl	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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