String -> StringBuilder, StrC to String (constant StrSlice), StrSlice (mutable slice) #56
Description
https://www.gingerbill.org/article/2024/04/05/string-type-distinctions/
Wanted to do this for a while ever since I used odin...
AST during C-library generation support already had its string fields converted to StrC (a constant string slice). I want to continue that and just go the full mile with the proper distinctions.