feat(catalog): add qdrant 1.18.2 chart

- Pull upstream qdrant-helm chart v1.18.2 (appVersion v1.18.2)
- Add PaaSup custom overrides: custom-values.yaml, dip-values.yaml
  (ingress.ingressClassName=apisix), dip resource/volume quotas
- No breaking changes to existing overrides vs 1.12.4; helm lint passes,
  image renders as docker.io/qdrant/qdrant:v1.18.2

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

manifests/helm/qdrant/1.18.2/dip-volumes-quotas.yaml

@@ -0,0 +1,17 @@
+small:
+  persistence:
+    accessModes: ["ReadWriteOnce"]
+    size: 10Gi
+    storageClassName: ""    
+
+medium:
+  persistence:
+    accessModes: ["ReadWriteOnce"]
+    size: 100Gi
+    storageClassName: ""    
+
+large:
+  persistence:
+    accessModes: ["ReadWriteOnce"]
+    size: 1Ti
+    storageClassName: ""