add initial marp implementation with sample content and build configuration

node_modules/mj-context-menu/js/abstract_menu.d.ts

@@ -0,0 +1,27 @@
+import { AbstractPostable } from './abstract_postable.js';
+import { Menu } from './menu.js';
+import { Item } from './item.js';
+import { VariablePool } from './variable_pool.js';
+export declare abstract class AbstractMenu extends AbstractPostable implements Menu {
+    protected className: import("./html_classes.js").HtmlClass;
+    protected variablePool: VariablePool<string | boolean>;
+    protected role: string;
+    protected _items: Item[];
+    private _baseMenu;
+    private _focused;
+    set baseMenu(menu: Menu);
+    get baseMenu(): Menu;
+    get items(): Item[];
+    set items(items: Item[]);
+    get pool(): VariablePool<string | boolean>;
+    get focused(): Item;
+    set focused(item: Item);
+    up(_event: KeyboardEvent): void;
+    down(_event: KeyboardEvent): void;
+    generateHtml(): void;
+    generateMenu(): void;
+    post(x?: number, y?: number): void;
+    unpostSubmenus(): void;
+    unpost(): void;
+    find(id: string): Item;
+}