feat(entity): add Guild entity with primary key and columns for guild_id and persistent_message_id

src/entity/Guilds.ts

@@ -0,0 +1,13 @@
+import { Column, Entity, PrimaryGeneratedColumn } from "typeorm";
+
+@Entity()
+export class Guild {
+    @PrimaryGeneratedColumn()
+    id: number;
+
+    @Column()
+    guild_id: string;
+
+    @Column()
+    persistent_message_id: string;
+}