feat: migrate node-feature-discovery and inteldeviceplugins-system to platform project (#48)

- Add node-feature-discovery and inteldeviceplugins-system to platform project
- Convert intel-nfd-rules from local Helm chart to static NodeFeatureRule manifests
- Add required Helm repositories (NFD OCI registry and Intel charts)
- Create base configurations with Helm charts and overlay structures
- Update platform ApplicationSet and project permissions

Reviewed-on: #48

ci/validate-apps.sh

@@ -18,6 +18,6 @@ while IFS= read -r -d "" k; do
         -summary \
         -output pretty \
         -verbose \
-        -skip CustomResourceDefinition \
+        -skip CustomResourceDefinition,GpuDevicePlugin \
         "${schema_args[@]}"
 done < <(find apps/overlays -name kustomization.yaml -print0)