chore: add invoice and subscription entities

src/modules/subscriptions/entities/user-subscription.entity.ts

@@ -0,0 +1,23 @@
+import { Column, Entity, ManyToOne } from "typeorm";
+
+import { SubscriptionPlan } from "./subscription.entity";
+import { BaseEntity } from "../../../common/entities/base.entity";
+import { User } from "../../users/entities/user.entity";
+
+@Entity()
+export class UserSubscription extends BaseEntity {
+  @ManyToOne(() => User, (user) => user.subscriptions, { nullable: false, onDelete: "CASCADE" })
+  user: User;
+
+  @ManyToOne(() => SubscriptionPlan, { nullable: false, onDelete: "CASCADE" })
+  plan: SubscriptionPlan;
+
+  @Column({ type: "timestamp", nullable: false }) // When the subscription started
+  startDate: Date;
+
+  @Column({ type: "timestamp", nullable: false }) // When it expires
+  endDate: Date;
+
+  @Column({ type: "boolean", default: false }) // Whether the user canceled it
+  isCanceled: boolean;
+}