add store to hold packages

src/Umbraco.Web.UI.Client/src/backoffice/packages/repository/package.store.ts

@@ -0,0 +1,41 @@
+import { BehaviorSubject } from 'rxjs';
+import { UmbContextToken } from '@umbraco-cms/context-api';
+import { UmbControllerHostInterface } from '@umbraco-cms/controller';
+import { UmbStoreBase } from '@umbraco-cms/store';
+
+/**
+ * Store for Packages
+ * @export
+ * @extends {UmbStoreBase}
+ */
+export class UmbPackageStore extends UmbStoreBase {
+	/**
+	 * Array of packages with extensions
+	 * @private
+	 */
+	#data = new BehaviorSubject<any[]>([]); // TODO: Replace with PackageModel
+
+	/**
+	 * Observable of packages with extensions
+	 */
+	rootItems = this.#data.asObservable();
+
+	/**
+	 * Creates an instance of PackageStore.
+	 * @param {UmbControllerHostInterface} host
+	 * @memberof PackageStore
+	 */
+	constructor(host: UmbControllerHostInterface) {
+		super(host, UmbPackageStore.name);
+	}
+
+	// TODO: Add model for packages when available
+	/**
+	 * Append items to the store
+	 */
+	appendItems(packages: Array<any>) {
+		this.#data.next(packages);
+	}
+}
+
+export const UMB_PACKAGE_STORE_TOKEN = new UmbContextToken<UmbPackageStore>(UmbPackageStore.name);