add toolbar config to manifest model

src/Umbraco.Web.UI.Client/src/packages/core/extension-registry/models/tinymce-plugin.model.ts

@@ -1,5 +1,41 @@
-import { ManifestClass } from "@umbraco-cms/backoffice/extension-api";
+import { ManifestClass } from '@umbraco-cms/backoffice/extension-api';
 
+export interface MetaTinyMcePlugin {
+	/**
+	 * If the plugin adds toolbar buttons, this property can be used to configure the buttons.
+	 * This configuration will be used on the Rich Text Editor configuration page.
+	 */
+	toolbar?: Array<{
+		/**
+		 * The alias of the toolbar button that will be configured in the TinyMCE editor.
+		 *
+		 * @see [TinyMCE Toolbar](https://www.tiny.cloud/docs/tinymce/6/toolbar-configuration-options/) for more information.
+		 */
+		alias: string;
+
+		/**
+		 * The label of the option shown on the Rich Text Editor configuration page.
+		 */
+		label: string;
+
+		/**
+		 * The icon shown on the Rich Text Editor configuration page. The icon has to be registered in the icon provider.
+		 * @optional
+		 */
+		icon?: string;
+	}>;
+}
+
+/**
+ * The manifest for a TinyMCE plugin.
+ * The plugin will be loaded into the TinyMCE editor.
+ * A plugin can add things like buttons, menu items, context menu items, etc. through the TinyMCE API.
+ * A plugin can also add custom commands to the editor.
+ * A plugin can also modify the behavior of the editor.
+ *
+ * @see [TinyMCE Plugin](https://www.tiny.cloud/docs/tinymce/6/apis/tinymce.plugin/) for more information.
+ */
 export interface ManifestTinyMcePlugin extends ManifestClass {
 	type: 'tinyMcePlugin';
+	meta?: MetaTinyMcePlugin;
 }