chore: ignore PyCharm .idea/ directory (#317)

Uncomment .idea/ directory in .gitignore to ensure PyCharm IDE project
configuration files are excluded from version control.

Author: rm-openai

.gitignore

@@ -135,7 +135,7 @@ dmypy.json
 cython_debug/
 
 # PyCharm
-#.idea/
+.idea/
 
 # Ruff stuff:
 .ruff_cache/