feat: add query provider for Tanstack

src/app/providers/QueryProvider.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+/**
+ * Query Provider Component
+ *
+ * All components that use useQueryClient() or createQuery() must be
+ * descendants of this provider.
+ */
+import { queryClient } from '$shared/api/queryClient';
+import { QueryClientProvider } from '@tanstack/svelte-query';
+
+/** Slot content for child components */
+let { children } = $props();
+</script>
+
+<QueryClientProvider client={queryClient}>
+    {@render children?.()}
+</QueryClientProvider>