feature: Add a data catalog like openmetadata or from microsoft

[suse-coder]

Add a data catalog, where users can upload data and when a user wants to use it it has to get approved. Would be a good fit as that is really what i miss in windmill. A little bit like openmetadata or in databricks catalog or Microsoft Purview/Onelake.

Would be great if one can have in Windmill one unified access point, where the different data connectors get the data, where in windmill it is unified in one data lake and one has one api and connection keys for each user (so one does not need to have it for every database hardcoded).