feat: initial zROC project recreation (stubs for large files pending)

- 61 files across zroc-ui/ and zroc-ova/ directories
- Full content written for: config, auth, API layers, CSS, build files,
  OVA scripts, backend routes, charts, hooks, constants
- Stubs in place for: page components, Sidebar, TopBar, docker-compose,
  authentik client, blueprint YAML, packer HCL, workflows, setup wizard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

zroc-ui/src/hooks/useInstantQuery.js

@@ -0,0 +1,18 @@
+// src/hooks/useInstantQuery.js
+import { useQuery } from '@tanstack/react-query';
+import { instantQuery } from '@/api/prometheus';
+
+export function useInstantQuery(promql, {
+  refreshMs = 30_000,
+  enabled   = true,
+  select,
+} = {}) {
+  return useQuery({
+    queryKey:    ['instant', promql],
+    queryFn:     () => instantQuery(promql),
+    refetchInterval: refreshMs,
+    enabled:     enabled && !!promql,
+    select,
+    staleTime:   refreshMs / 2,
+  });
+}