Unicode: adding compact version of GeneralCategory (resolves #24789)
The following features are applied:
- Lookup code like Cmm-switches (draft implementation proposed by Sylvain Henry @hsyl20)
- Nested ifs (logarithmic search vs linear search) (the idea proposed by Sylvain Henry @hsyl20)
Reviewers + Pierre Le Marre @Wismill (can't add you to reviewers list, but mention here at least)