Resolve "Clean documents and dev-overrides"

General MR

Summary

External secrets docs and overrides clean up.

Relevant logs/screenshots

chuka@DESKTOP-006TSPC:~/bigbang/bigbang$ k get pods -n external-secrets
NAME                               READY   STATUS    RESTARTS   AGE
external-secrets-85bc67b7f-5rlp2   2/2     Running   0          34s

Linked Issue

closes #94 (closed)

Upgrade Notices

N/A

Related to #94 (closed)