chore: add ticket module and tickets entity

src/modules/tickets/entities/ticket-category.entity.ts

@@ -0,0 +1,16 @@
+import { Column, Entity, OneToMany } from "typeorm";
+
+import { Ticket } from "./ticket.entity";
+import { BaseEntity } from "../../../common/entities/base.entity";
+
+@Entity()
+export class TicketCategory extends BaseEntity {
+  @Column({ type: "varchar", length: 150, nullable: false, unique: true })
+  name: string;
+
+  @Column({ type: "text", nullable: true })
+  description: string;
+
+  @OneToMany(() => Ticket, (ticket) => ticket.category)
+  tickets: Ticket[];
+}