Daniel Chao
6b9c670cfd
This adds syntax highlighting of Pkl code! It adds highlighting for: * Stack frames within error messages * CLI REPL (highlights as you type, highlights error output) * Power assertions (coming in https://github.com/apple/pkl/pull/1384) This uses the lexer for highlighting. It will highlight strings, numbers, keywords, but doesn't understand how to highlight nodes like types, function params, etc. The reason for this is because a single line of code by itself may not be grammatically valid.