feat: implement working reconciliation logic and documentation

initial commit for working reconciliation logic, no automated test only manually tested for now

config/manager/image_pull_secret_patch.yaml

@@ -0,0 +1,10 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: controller-manager
+  namespace: system
+spec:
+  template:
+    spec:
+      imagePullSecrets:
+      - name: ghcr-secret