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

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

@@ -0,0 +1,13 @@
+import { OptimisticMutationConfig } from "@urql/exchange-graphcache"
+
+export const optimisticDefs: OptimisticMutationConfig = {
+  deleteTeam: () => true,
+  leaveTeam: () => true,
+  renameTeam: ({ teamID, newName }) => ({
+    __typename: "Team",
+    id: teamID,
+    name: newName,
+  }),
+  removeTeamMember: () => true,
+  // TODO: updateTeamMemberRole
+}