feat: add Agents UI to proprietary right sidebar (#6454)

Update UI to include agents

Run `task dev:all` to test

frontend/editor/src/proprietary/components/agents/StirlingLogoOutline.tsx

@@ -0,0 +1,21 @@
+/**
+ * A temp stirling logo, may change in future.
+ */
+export function StirlingLogoOutline({ size = 20 }: { size?: number }) {
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      width={size}
+      height={size}
+      viewBox="0 0 192 192"
+      fill="currentColor"
+      aria-hidden="true"
+    >
+      <path
+        d="M68.48 102.4 L184.73 6.45 L184.73 96.05 L68.48 192 Z"
+        opacity="0.5"
+      />
+      <path d="M7.26 95.83 L123.37 0 L123.37 89.5 L7.26 185.33 Z" />
+    </svg>
+  );
+}