refactor: one self-contained folder per platform service

Each platform/apps/<service>/ now holds its own application.yaml
(multi-source: chart + values + raw-manifest extras), values.yaml, and
any extra manifests (HTTPRoute, RBAC, ClusterSecretStore) together,
replacing the split apps/*.yaml + manifests/*/ + separate *-config
Application pattern.

Root platform-app.yaml now recurses platform/apps/*/application.yaml
only. Extras get a resource-level sync-wave (1) so they still land
after their service's Helm chart within the same Application sync.

Also adds an HTTPRoute for vault (vault.fireflylab.local) - exposed
same as every other service here, accepted as LAN-only exposure.

platform/apps/jenkins/values.yaml

@@ -0,0 +1,14 @@
+controller:
+  serviceType: ClusterIP
+  persistence:
+    storageClass: nfs-delete
+    size: 20Gi
+  resources:
+    requests:
+      cpu: 250m
+      memory: 1Gi
+    limits:
+      memory: 2Gi
+
+agent:
+  enabled: true