Update .gitignore to exclude Python cache and temporary files

Added comprehensive gitignore rules to prevent binary files from being committed:
- Python cache files (__pycache__/, *.pyc, *.pyo, *.pyd)
- Database files (*.db, *.sqlite, *.sqlite3)
- Environment files (.env, .env.local)
- IDE files (.vscode/, .idea/, *.swp, *.swo)
- OS files (.DS_Store, Thumbs.db)

This prevents future push rejections from HuggingFace Spaces due to binary files.

.gitignore

@@ -1,2 +1,28 @@
 # Ignore Python virtual environment
-.venv/
+.venv/
+
+# Ignore Python cache files
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+
+# Ignore database files
+*.db
+*.sqlite
+*.sqlite3
+
+# Ignore environment files
+.env
+.env.local
+
+# Ignore IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Ignore OS files
+.DS_Store
+Thumbs.db