feat: support importing scene from url (#2726)

src/locales/en.json

@@ -142,6 +142,7 @@
     "confirmAddLibrary": "This will add {{numShapes}} shape(s) to your library. Are you sure?",
     "imageDoesNotContainScene": "Importing images isn't supported at the moment.\n\nDid you want to import a scene? This image does not seem to contain any scene data. Have you enabled this during export?",
     "cannotRestoreFromImage": "Scene couldn't be restored from this image file",
+    "invalidSceneUrl": "Couldn't import scene from the supplied URL. It's either malformed, or doesn't contain valid Excalidraw JSON data.",
     "resetLibrary": "This will clear your library. Are you sure?"
   },
   "toolBar": {