feat(music): add song download functionality and rename client class

- Implement download_song method in MusicClient with progress tracking
- Rename songboxClient to SongboxClient for consistency
- Update documentation and examples to reflect class name change
- Add download command to CLI interface

setup.py

@@ -51,8 +51,8 @@ setup(
     },
     keywords="songbox music api client streaming maldives",
     project_urls={
-        "Bug Reports": "https://github.com/yourusername/songbox/issues",
-        "Source": "https://github.com/yourusername/songbox",
-        "Documentation": "https://github.com/yourusername/songbox#readme",
+        "Bug Reports": "https://git.cubable.date/CustomIcon/songbox/issues",
+        "Source": "https://git.cubable.date/CustomIcon/songbox",
+        "Documentation": "https://git.cubable.date/CustomIcon/songbox/src/branch/master/README.md",
     },
 )