Unified task runner scripts

[approxit]

Bucke up folks, massive diff is comming!

What I've done:

• Unified task runner scripts according to other libraries
• Bumped mypy version to be able to install other dependencies
• Added pyproject-autoflake because for some reason at current setup autoflake was not picking up config from pyproject.toml
• Commented out few flake8 errors and few mypy paths, this should be done as separate work
• Added __init__.py files into examples and tests to satisfy mypy.
• Renamed few directories in examples to satisfy mypy (as they are now python packages).

Changes are mostly related to formatting or small fixes such as specifying exception types in except blocks, changing == to is for None values, etc.

[shadeofblue]

hmm, given that we don't treat the examples as modules but rather self-contained scripts, I'm unsure why we'd need __init__ files in there... ?

[approxit]

Regarding __init__.py in examples and tests, I've commented at the very begining that it was added to satisfy mypy, because it encounter errors about loading files without __init__.py. I could reconfigure mypy to check specific list of directories, instead of whole codebase.

Regarding property docs - change was made to satisfy pydocstyle - should we fight with this?