Remove unnecessary files and add OS/Python cache files to .gitignore

- Remove .DS_Store (macOS system file)
- Remove Python __pycache__ files (compiled bytecode)
- Add .DS_Store, Thumbs.db, desktop.ini to .gitignore
- Add Python cache patterns (__pycache__/, *.pyc, *.pyo, *.pyd) to .gitignore

.gitignore

@@ -156,3 +156,15 @@ exemple/
 # OCR training data
 *.traineddata
 eng.traineddata
+
+# OS and editor files
+.DS_Store
+Thumbs.db
+desktop.ini
+
+# Python cache files
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python