[Chore] Replace enum with registry system for feature flags

Proposed changes

Fixes #14

This PR points to replace enum generated classes to replace with registry system

Types of changes

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[X] Bugfix (non-breaking change which fixes an issue)
[X] New feature (non-breaking change which adds functionality)
[X] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] Documentation Update (if none of the other choices apply)

Checklist

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[X] I have read the CONTRIBUTING.md
[X] I have added tests that prove my fix is effective or that my feature works
[X] I have added necessary documentation (if appropriate)

Further comments

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OneLiteFeatherNET / Microtus