chore(ckeditor5-keyboard-marker): port source code

packages/ckeditor5-keyboard-marker/src/kbd.ts

@@ -0,0 +1,22 @@
+import { Plugin } from 'ckeditor5';
+import KbdEditing from './kbdediting.js';
+import KbdUI from './kbdui.js';
+
+/**
+ * The keyboard shortcut feature.
+ *
+ * Provides a way to semantically mark keyboard shortcuts/hotkeys in the content.
+ *
+ * This is a "glue" plugin which loads the `KbdEditing` and `KbdUI` plugins.
+ */
+export default class Kbd extends Plugin {
+
+	static get requires() {
+		return [ KbdEditing, KbdUI ];
+	}
+
+	public static get pluginName() {
+		return 'Kbd' as const;
+	}
+
+}