Multiline colorize function needed

Right now, the colorize function can only process words that span in single line only. We need to come up with a solution to process strings that span across multiple lines:
- multi-line comments
- multi-line strings

Start by locating the colorize function in the JavaScript editor code and trace how it processes single-line words. Check whether existing tests or examples cover comments and strings, then define completion as correctly colorizing both multi-line comments and multi-line strings without breaking single-line cases.

Written by the indexing model from the issue text.