Separate types & fix #private import

server/routers/billing/types.ts

@@ -0,0 +1,17 @@
+import { Limit, Subscription, SubscriptionItem, Usage } from "@server/db";
+
+export type GetOrgSubscriptionResponse = {
+    subscription: Subscription | null;
+    items: SubscriptionItem[];
+};
+
+export type GetOrgUsageResponse = {
+    usage: Usage[];
+    limits: Limit[];
+};
+
+export type GetOrgTierResponse = {
+    tier: string | null;
+    active: boolean;
+};
+