feat: remove appwrite and add nextjs backend

backend/src/auth/dto/authSignIn.dto.ts

@@ -0,0 +1,7 @@
+import { PickType } from "@nestjs/swagger";
+import { AuthDTO } from "./auth.dto";
+
+export class AuthSignInDTO extends PickType(AuthDTO, [
+  "email",
+  "password",
+] as const) {}