add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/js/util/PrioritizedList.d.ts

@@ -0,0 +1,12 @@
+export interface PrioritizedListItem<DataClass> {
+    priority: number;
+    item: DataClass;
+}
+export declare class PrioritizedList<DataClass> {
+    static DEFAULTPRIORITY: number;
+    protected items: PrioritizedListItem<DataClass>[];
+    constructor();
+    [Symbol.iterator](): Iterator<PrioritizedListItem<DataClass>>;
+    add(item: DataClass, priority?: number): DataClass;
+    remove(item: DataClass): void;
+}