Better configmap handling

Created by: HighSaltLevels

What/Why

I thought it would be better to just straight up shove the marshaled json directly into the configmap instead of going with the whole custom resource route or the sus json building with strings. As soon as I deploy this into the cluster, I need to port all of the existing reminders to the new format.

Also, I added a ton of tests. I don't think it's possible to get a full 100% coverage without doing some incredibly sus things. Mainly because it's difficult to test the kubernetes-specific components. But I did add a helper script.

Resolves #33 (closed) Resolves #34 (closed)