refactor(cli): hide fine-tunes command, use ft as primary

- Set fine-tunes as hidden in help output (hidden=True)
- Keep ft as the primary command name
- fine-tunes command still works for backward compatibility
- Reduces command list clutter in main help

Author: zhansheng.lzs

dashscope/cli/__init__.py

@@ -148,8 +148,8 @@ def _extract_global_api_key(argv):
 
 # Register sub-command groups
 app.add_typer(generation.app)
-app.add_typer(fine_tunes.app)
-app.add_typer(fine_tunes.app, name="ft")  # 别名：ft
+app.add_typer(fine_tunes.app, name="ft")  # 主要命令
+app.add_typer(fine_tunes.app, name="fine-tunes", hidden=True)  # 隐藏，向后兼容
 app.add_typer(files.app)
 app.add_typer(deployments.app)
 app.add_typer(oss.app)