Add Python comment stripper tool using Pyodide and tokenize (#226)

Single-page tool that strips comments from Python code using the
standard library tokenize module via Pyodide. Features auto-strip
on input, copy to clipboard, and 16 inline tests covering edge
cases (strings with hashes, f-strings, docstrings, shebangs, etc).

https://claude.ai/code/session_01J5SJG2a32nwpVGAVS4cvhZ

Co-authored-by: Claude <noreply@anthropic.com>

Author: simonw