Azadkia-Chatterjee coefficient

[kahaaga]

Implements #380.

The docs are here.

This PR contains

• The AzadkiaChatterjeeCoefficient struct, which dispatches to association with either two or three input datasets (corresponding to pairwise or conditional association) + tests.
• Implementations for AzadkiaChatterjeeCoefficient for both SurrogateAssociationTest (pairwise and conditional) and LocalPermutationTest (conditional) + tests.
• A listing for AzadkiaChatterjeeCoefficient in the documentation pages.
• Cross references in AssociationMeasure and AssociationMeasureEstimator docstrings.
• Many runnable documentation examples that are cross-referenced everywhere necessary (example 1, example 2).

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.03922% with 2 lines in your changes missing coverage. Please review.

Project coverage is 94.97%. Comparing base (a0014fc) to head (e426c5e).

Files	Patch %	Lines
src/methods/correlation/chatterjee.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #385      +/-   ##
==========================================
+ Coverage   94.87%   94.97%   +0.10%     
==========================================
  Files         108      111       +3     
  Lines        3103     3205     +102     
==========================================
+ Hits         2944     3044     +100     
- Misses        159      161       +2     

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