Enum.GetNames replaced with IToText on enum label generation to leverage DisplayText attribute

[pawelbaran]

Issues addressed by this PR

Closes #447

Test files

Create DensityExtractionType enum in Grasshopper and see if the first option shows as AllMatching (current) or All matching. (desired).

Changelog

Additional comments

[pawelbaran]

@BHoMBot check core @BHoMBot check compliance

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[pawelbaran]

@BHoMBot check versioning @BHoMBot check installer

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[pawelbaran]

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