feat: Choose random color on collection creation (#3912)

Choose a random color from a shared color palette between backend
and frontend during collection creation.

shared/utils/collections.ts

@@ -28,3 +28,16 @@ export const sortNavigationNodes = (
       : document.children,
   }));
 };
+
+export const colorPalette = [
+  "#4E5C6E",
+  "#0366d6",
+  "#9E5CF7",
+  "#FF825C",
+  "#FF5C80",
+  "#FFBE0B",
+  "#42DED1",
+  "#00D084",
+  "#FF4DFA",
+  "#2F362F",
+];