Set up CSS module support

[koesie10]

This sets up support for CSS modules such that the following would now work:

ActionButton.module.css:

.button {
  display: block;
}

import styles from "./ActionButton.module.css";

export const ActionButton = () => {
  return <button className={styles.button} />
}

[Copilot]

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

Files not reviewed (2)

• extensions/ql-vscode/package.json: Language not supported
• extensions/ql-vscode/src/view/tsconfig.json: Language not supported

[tuan-nguen]

Thanks!