refactor: extract cache info to separate files and add more mutations

packages/hoppscotch-app/helpers/backend/caching/keys.ts

@@ -0,0 +1,7 @@
+import { KeyingConfig } from "@urql/exchange-graphcache";
+
+export const keyDefs: KeyingConfig = {
+  User: (data) => (data as any).uid,
+  TeamMember: (data) => (data as any).membershipID,
+  Team: (data) => data.id as any,
+}