[Technical Debt] Unsorted list of "todos" mentioned here and there:

[DEKHTIARJonathan]

• validation could maybe be done with typing.get_type_hints()
  [Refactoring] Code Re-factoring - Preparing for configuration read & sorting algorithm #22 (comment)
  Note Jonathan: let's see how it works - not convinced it's really worth it

• using re.VERBOSE in regex: [Refactoring] Code Re-factoring - Preparing for configuration read & sorting algorithm #22 (comment)

• remove ^ and $ from regular expressions (so they could be reused easily) and use re.fullmatch() where appropriate: Use re.fullmatch() instead of embedding ^$ #50

• move shared fixtures to conftest.py: Move mocked_plugin_loader fixture to conftest.py #49