feat(backend): ✨ migrate site-settings to groups (#673)

* feat(frontend): ✨ add user registration page (WIP)

* feat(backend): ✨ add user registration (WIP)

* test(backend): ✅ add validator testing for registration schema

* feat(backend): ✨ continued work on user sign-up

* feat(backend): ✨ add signup flow and user/group settings

* test(backend): ✅ user-creation tests and small refactor of existing tests

* fix(backend): ✅ fix failing group tests

* style: 🎨 fix lint issues

Co-authored-by: hay-kot <hay-kot@pm.me>

frontend/api/class-interfaces/user-registration.ts

@@ -0,0 +1,25 @@
+import { BaseAPI } from "./_base";
+
+export interface RegisterPayload {
+  group: string;
+  groupToken: string;
+  email: string;
+  password: string;
+  passwordConfirm: string;
+  advanced: boolean;
+  private: boolean;
+}
+
+const prefix = "/api";
+
+const routes = {
+  register: `${prefix}/users/register`,
+};
+
+export class RegisterAPI extends BaseAPI {
+  /** Returns a list of avaiable .zip files for import into Mealie.
+   */
+  async register(payload: RegisterPayload) {
+    return await this.requests.post<any>(routes.register, payload);
+  }
+}