refactor: split backend by context instead of type 'controllers/models/...'

app/collections/models/collection.ts

@@ -0,0 +1,29 @@
+import { Visibility } from '#collections/enums/visibility';
+import AppBaseModel from '#core/models/app_base_model';
+import Link from '#links/models/link';
+import User from '#user/models/user';
+import { belongsTo, column, hasMany } from '@adonisjs/lucid/orm';
+import type { BelongsTo, HasMany } from '@adonisjs/lucid/types/relations';
+
+export default class Collection extends AppBaseModel {
+	@column()
+	declare name: string;
+
+	@column()
+	declare description: string | null;
+
+	@column()
+	declare visibility: Visibility;
+
+	@column()
+	declare nextId: number;
+
+	@column()
+	declare authorId: number;
+
+	@belongsTo(() => User, { foreignKey: 'authorId' })
+	declare author: BelongsTo<typeof User>;
+
+	@hasMany(() => Link)
+	declare links: HasMany<typeof Link>;
+}