refactor(clients): reorganize client modules into clients package

- Move auth, user, and music clients into new clients package
- Update imports to use new module paths
- Add __init__.py to expose clients from package
- Clean up code formatting and imports
- Add pre-commit configuration for code quality checks

README.md

@@ -204,18 +204,18 @@ try:
     # Step 1: Initiate login
     verify_id = client.auth.login("960", "7777777")
     print(f"OTP sent! Verification ID: {verify_id}")
-    
+
     # Step 2: Get OTP from user
     otp = input("Enter OTP: ")
-    
+
     # Step 3: Verify OTP and get token
     token = client.auth.verify_otp(otp, verify_id)
     print(f"Login successful! Token: {token}")
-    
+
     # Step 4: Use the API
     user_info = client.user.get_me()
     print(f"Welcome, {user_info['username']}!")
-    
+
 except AuthenticationError as e:
     print(f"Authentication failed: {e}")
 finally:
@@ -232,7 +232,7 @@ for category in results:
     print(f"\n{category['title']}:")
     for item in category['items'][:3]:  # Show top 3
         print(f"  {item['heading']} - {item['sub_heading']}")
-        
+
         # Get detailed info if it's a song
         if category['title'] == 'Songs':
             try:
@@ -281,4 +281,4 @@ This project is licensed under the MIT License - see the [LICENSE](LICENSE) file
 
 ---
 
-**Note**: This is an unofficial client library. songbox is a trademark of its respective owners.
+**Note**: This is an unofficial client library. songbox is a trademark of its respective owners.