- add references, collections and identifiers to dataset model

- npm updates

app/Models/Collection.ts

@@ -0,0 +1,45 @@
+import { column, BaseModel, SnakeCaseNamingStrategy, manyToMany, ManyToMany } from '@ioc:Adonis/Lucid/Orm';
+import Dataset from './Dataset';
+
+export default class Collection extends BaseModel {
+    public static namingStrategy = new SnakeCaseNamingStrategy();
+    public static primaryKey = 'id';
+    public static table = 'collections';
+    public static fillable: string[] = ['name', 'number', 'role_id'];
+
+    @column({
+        isPrimary: true,
+    })
+    public id: number;
+
+    @column({})
+    public document_id: number;
+
+    @column({})
+    public role_id?: number;
+
+    @column({})
+    public number?: string;
+
+    @column({})
+    public name: string;
+
+    @column({})
+    public oai_subset?: string;
+
+    @column({})
+    public parent_id?: number;
+
+    @column({})
+    public visible: boolean;
+
+    @column({})
+    public visible_publish: boolean;
+
+    @manyToMany(() => Dataset, {
+        pivotForeignKey: 'collection_id',
+        pivotRelatedForeignKey: 'document_id',
+        pivotTable: 'link_documents_collections',
+    })
+    public datasets: ManyToMany<typeof Dataset>;
+}