feat(homelab): isolate PR runner and add Paperless

paperless/k8s/secrets.yaml.example

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: paperless-secrets
+  namespace: paperless
+type: Opaque
+stringData:
+  PAPERLESS_SECRET_KEY: "<GENERATE_WITH_python3_-c_import_secrets;_print(secrets.token_urlsafe(64))>"
+  PAPERLESS_ADMIN_PASSWORD: "<SET_A_LONG_UNIQUE_PASSWORD>"
+  PAPERLESS_DB_PASSWORD: "<SET_THE_SAME_VALUE_AS_database_PAPERLESS_DB_PASSWORD>"