Refactor: Add type annotations to regex extraction results

[pyob-bot]

Summary of Changes

• Added explicit type annotations (list[str]) to the results of re.findall calls within the _parse_javascript and _parse_html methods.
• Improved code readability and static analysis compatibility by defining the expected return types for these regex operations.

Technical Impact

• Enhances type safety within the CodeParser class.
• Facilitates better IDE autocompletion and static type checking (e.g., via Mypy or Pyright) for the variables holding regex matches.
• No changes were made to the underlying regex logic or runtime behavior.