feat: Implement draft version of getBillingAndUsage query

packages/backend/src/graphql/schema.graphql

@@ -37,6 +37,7 @@ type Query {
   getUsageData: GetUsageData
   getPaymentPlans: [PaymentPlan]
   getPaddleInfo: GetPaddleInfo
+  getBillingAndUsage: GetBillingAndUsage
   getAutomatischInfo: GetAutomatischInfo
   healthcheck: AppHealth
 }
@@ -472,6 +473,19 @@ type GetAutomatischInfo {
   isCloud: Boolean
 }
 
+type GetBillingAndUsage {
+  subscription: Subscription
+}
+
+type Subscription {
+  monthlyQuota: String
+  updateUrl: String
+  cancelUrl: String
+  status: String
+  nextBillAmount: String
+  nextBillDate: String
+}
+
 type GetUsageData {
   name: String
   allowedTaskCount: Int