feat: user profiles (#32)

* add user profiles and theme selectors

* lowercase buttons by default

* basic layout

* (wip) init token APIs

* refactor server to support variable options

* fix types

* api refactor / registration tests

* implement UI for url and join

* remove console.logs

* rename repository factory

* fix upload size

frontend/lib/api/classes/group.ts

@@ -0,0 +1,11 @@
+import { BaseAPI, route } from "../base";
+import { GroupInvitation, GroupInvitationCreate } from "../types/data-contracts";
+
+export class GroupApi extends BaseAPI {
+  createInvitation(data: GroupInvitationCreate) {
+    return this.http.post<GroupInvitationCreate, GroupInvitation>({
+      url: route("/groups/invitations"),
+      body: data,
+    });
+  }
+}