* Merge AsciiCharset CT/non-CT Functions
* release notes
* incorporate helpful review feedback
* re-separate 'create_set' and 'contains' but keep 'combine_sets'; update tests
* tabs (annoying IDE)
* Restored old code verbatim for smaller diff. Split combine_sets into easier to macro/function for runtime / macro version, this also allows for more easy type checks.
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Co-authored-by: Christoffer Lerno <christoffer@aegik.com>