Emil.roydev/dart renderer #1
                
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What
Added specialized readFixedArray / writeFixedArray methods for different integer sizes in BinaryReader and BinaryWriter.
Uint64List, Int64List, ...dart types instead of justintandBigIntImplemented recursiveBorsh serialization/deserialization macro's.
Updated the other templates to use the new macro logic.
Mapping
Since this is combination of @aleksandar-petrov-lime branch and my logic on top of it. To review my logic focus on these commits: