feat(cloud): unlimited seats (#166)

* feat: add unlimitedSeats to subscription

* feat: set unlimited seats to true for pro plans

* feat: add unlimited invites messaging

* feat: upgrade to pro via auth client

* feat: add subscription repo funcs

* chore: move subscription utils to shared

* feat: skip updating subscription if unlimited seats

packages/db/src/schema/subscriptions.ts

@@ -23,6 +23,7 @@ export const subscription = pgTable("subscription", {
   periodEnd: timestamp("periodEnd"),
   cancelAtPeriodEnd: boolean("cancelAtPeriodEnd"),
   seats: integer("seats"),
+  unlimitedSeats: boolean("unlimitedSeats").default(false).notNull(),
   trialStart: timestamp("trialStart"),
   trialEnd: timestamp("trialEnd"),
   createdAt: timestamp("createdAt").notNull().defaultNow(),