__version__ for bentoctl package

[jjmachan]

• bentoctl --version and bentoctl.__version__ for getting the version of the bentoctl package
• Single source for the bentoctl package version which is the pyproject.toml file tool.poetry.version. This is to be updated with the poetry version command.

[codecov]

Codecov Report

Merging #70 (670b765) into main (e8cccc4) will increase coverage by 0.33%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
+ Coverage   64.13%   64.46%   +0.33%     
==========================================
  Files          15       15              
  Lines         750      757       +7     
==========================================
+ Hits          481      488       +7     
  Misses        269      269              

Flag	Coverage Δ
unit-tests	64.46% <100.00%> (+0.33%)	⬆️

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Impacted Files	Coverage Δ
bentoctl/__init__.py	100.00% <100.00%> (ø)
bentoctl/cli/__init__.py	61.61% <100.00%> (+0.79%)	⬆️

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