Kubernetes: added multiple microservices

- added minio object storage
- added immich photo viewer
- added cloudnative-pg postgres operator for db management
- added cronjobs to run different maintenance tasks
- updated readme

kubernetes/cloud-native-pg/backup.yaml

@@ -0,0 +1,10 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: ScheduledBackup
+metadata:
+  name: immich-db-backup
+spec:
+  immediate: true
+  schedule: "0 0 0 * * *"  # At midnight every day
+  backupOwnerReference: self
+  cluster:
+    name: pg-backup