Use RAGFlow CLI to replace RAGFlow Admin CLI (#12653)

### What problem does this PR solve?

```
$ python admin/client/ragflow_cli.py -t user -u aaa@aaa.com -p 9380

ragflow> list datasets;
ragflow> list default models;
ragflow> show version;

```


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

admin/client/pyproject.toml

@@ -21,4 +21,4 @@ test = [
 ]
 
 [project.scripts]
-ragflow-cli = "admin_client:main"
+ragflow-cli = "ragflow_cli:main"