WIP - Add extension for Chairmarks

[VarLad]

Chairmarks internal design different from BenchmarkTools.jl
So wrapping it would be different from Benchmarks.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 43.75%. Comparing base (2aa5310) to head (09d445d).
Report is 1 commits behind head on dev.

Files	Patch %	Lines
ext/ChairmarksExt/b.jl	0.00%	18 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev      #37      +/-   ##
==========================================
- Coverage   50.90%   43.75%   -7.16%     
==========================================
  Files           6        7       +1     
  Lines         110      128      +18     
==========================================
  Hits           56       56              
- Misses         54       72      +18     

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