[Feat] ZUI: implement API key management

[andaaron]

The UI needs to implement a way for the user to manage how own API keys.
The UI will leverage the APIs for creating/listing/deleting API keys implemented on the backend, see https://github.com/project-zot/zot/blob/main/examples/README.md#api-keys

[andaaron]

Note the backend implementation for listing existing API keys is still WIP at the time of this writing.

[andaaron]

This has been unblocked by project-zot/zot#1708.
Note project-zot/zot#1708 implements the API to retrieve the API keys as well as the expiration date feature.