feat: Implement collaboration features including user following and avatar management

app/src/components/templates/FollowPerson.tsx

@@ -0,0 +1,29 @@
+import React from "react";
+import RenderOverlay from "./Overlay";
+import { useSelectedUserStore } from "../../store/useCollabStore";
+import { useCamMode } from "../../store/store";
+
+const FollowPerson: React.FC = () => {
+  // Get the selected user from the store
+  const { selectedUser, clearSelectedUser } = useSelectedUserStore();
+  const { setCamMode } = useCamMode();
+  return (
+    <RenderOverlay>
+      {selectedUser && (
+        // eslint-disable-next-line
+        <div
+          className="follow-person-container"
+          onClick={() => {
+            clearSelectedUser();
+            setCamMode("FirstPerson");
+          }}
+          style={{ "--user-color": selectedUser.color } as React.CSSProperties}
+        >
+          <div className="follower-name">{selectedUser.name}</div>
+        </div>
+      )}
+    </RenderOverlay>
+  );
+};
+
+export default FollowPerson;