Improve the colorizer (Lexer-based) #3460
Description
This issue to track replacing the regular expression-based colorizer for lexing with the lexer-based colorizer used by Visual Studio. This is different from the semantic based colorization being tracked at #230 (which requires Intellisense and parsing of types).
We already run a C++ lexer over code, but the tokens aren't used to change the colors. It's possible this might require LSP changes by VS Code.