Add Python cache files to .gitignore

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: DerekSeaman

.gitignore

@@ -1,2 +1,4 @@
 .esphome/
 .DS_Store
+__pycache__/
+*.pyc