Add TypeChecker

[takesei]

• TaguPy version:
• Python version:
• Operating System:

What

• Add mypy which is responsible for typing checker in python.
• You can now call mypy with make typing
• make test-all also supports typing.

[codecov-commenter]

Codecov Report

Merging #23 (7e21451) into main (57bbc5c) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #23   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           13        13           
  Lines           81        81           
=========================================
  Hits            81        81           

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[takesei]

https://mypy.readthedocs.io/en/stable/config_file.html