Experimental/educational Argo umbrella chart

What?

This "argo" helm chart currently defaults to the following:

A local dev-configuration for Argo CD, deployed in the operators namespace by default.
A local dev-configuration for MinIO, deployed in the operators namespace by default. This takes care of local bucket access, so you don't need AWS or GCS storage.
PostgresSQL database, that serves as workflow archive. NOTE that this database is NOT backed up on any bucket- or other storage!
Argo Workflows deployment in the operators namespace by default. It is able to deploy workflows in the data namespace. It writes logs in the MinIO argo bucket, and writes completed workflow archives to the PostgreSQL database.
Argo Events deployment in the operators namespace by default. It is able to manage events in the data namespace.
Argo event bus in operators and data namespaces (Argo Events doesn't do much without it).