com.miui.cleaner documentation (Cleaner app)

**Your phone**: Xiaomi 11T

**Packages documentation to update:**
```
com.miui.cleaner
```
## Documentation chage
### com.miui.cleaner
**List**: Unlisted :arrow_right: Misc

**Current description**
> n/a

**Proposed description**
> This is the "Cleaner" app. Safe to remove (might only work with "disable") but you will not be able to uninstall multiple apps in "settings, apps, manage apps" you will also lose some options for battery saving mode in individual apps and some more app security options.

## Notes
Not sure if it should be recommended to remove per se, but it is safe to remove from what I can tell - however UNINSTALL wont take care of it, only DISABLE. Disabling it will not remove the app shortcut from the home page if you have it on there, tapping it will show an "app isnt installed on this device" message. The shortcut can be removed from the home page as normal.

Update: based on @ll0r3nt3 's comment I updated the proposed description. Perhaps it's best not to remove this, but the documentation should explain more about the role of this app.

Find the documentation file for the com.miui.cleaner package in the project's data or documentation directory. Update the description to the proposed text, ensuring the list category is changed from 'Unlisted' to 'Misc'. Verify the change by checking the app's behavior in the GUI or related documentation.

索引モデルが issue の本文から書いたものです。