MC Authentication + Account switching (#78)

* Popup, login

* Fix Lint

* Switch to UUID for avatars

* Fix issues

* Fixed logging out bug

* Update AccountsCard.vue

* Revert experiment

* Fix button clicking

* Addressed Changes

theseus_gui/src/components/ui/Instance.vue

@@ -77,6 +77,7 @@ const props = defineProps({
     width: 100%;
     border-radius: var(--radius-sm);
     filter: none !important;
+    aspect-ratio: 1;
   }
   .project-info {
     margin-top: 1rem;