[[ Char Chunks ]] Added parsing for new codepoint, codeunit and byte chunk types, adjusted text marking to use codeunit indices
[[ CharChunks ]] Implemented codepoint and codeunit chunk types
[[ ByteChunk ]] Implemented byte chunk (currently identical to codeunit chunk but evaluates to DataRef)
[[ CharChunks ]] Implemented repeat for each ... for new char chunks
Make sure settextindex clamps correctly on INDEX_MAX input
[[ RefactorSyntax ]] Some minor tweaks
[[ RefactorSyntax ]] Various fixes
Merge remote-tracking branch 'upstream/refactor-syntax_unicode' into refactor-syntax_unicode
Merge remote-tracking branch 'upstream/refactor-syntax_unicode_char_chunks' into refactor-syntax_unicode