refactor: drop cursor from the JS printer

tidy has no cursorOffset, rangeStart or rangeEnd, so bun's cursor
tracking and range formatting go, with the cursor marks of the IR.
js::text is tidy's text helpers plus the few only the printer uses,
js::stack is tidy's Stack, js::sort a stable sort for any comparison,
and the printer's uses of bstr and bun's lexer, token and string
helpers point at tidy's or at the standard library.