chore: integrate firestore for particles (#32)

* plumb for firestore

* chore: cleanup orion api to only include essentials

* setup boilerplate for data and rendering

This includes zod types creation for API response validation, and
exploration of path based resolution of rendering particles.

* chore: structure container particles for rendering children

* wire firestore crud for particles

* integrate visibility to particles

* docs: explain particle view resolver

js/src/features/particles/folder-view.tsx

@@ -0,0 +1,20 @@
+import { Particle } from "@/api/types";
+import { useParticleChildren } from "@/hooks/use-particle-children";
+
+interface FolderViewProps {
+  folderParticle: Particle;
+  networkId: string;
+  particleSegments: string[];
+}
+
+export function FolderView({ networkId, particleSegments, folderParticle }: FolderViewProps) {
+  const { children, error, isLoading } = useParticleChildren(networkId, particleSegments);
+
+  return (
+    <div className="flex h-full items-center justify-center">
+      <p className="text-muted-foreground text-sm">
+        Folder view — {networkId}/{particleSegments.join("/")}
+      </p>
+    </div>
+  );
+}