Added ORM entities

src/entities/chat.ts

@@ -0,0 +1,21 @@
+import { Entity, ManyToOne, PrimaryKey, Property } from '@mikro-orm/core';
+import { Character } from './character';
+import { Zone } from './zone';
+
+@Entity()
+export class Chat {
+  @PrimaryKey()
+  id!: number;
+
+  @ManyToOne(() => Character)
+  character!: Character;
+
+  @ManyToOne(() => Zone)
+  zone!: Zone;
+
+  @Property()
+  message!: string;
+
+  @Property()
+  createdAt = new Date();
+}