add initial marp implementation with sample content and build configuration

node_modules/mathjax-full/js/input/tex/cases/CasesConfiguration.d.ts

@@ -0,0 +1,20 @@
+import { Configuration } from '../Configuration.js';
+import TexParser from '../TexParser.js';
+import { BeginItem, EqnArrayItem } from '../base/BaseItems.js';
+import { AmsTags } from '../ams/AmsConfiguration.js';
+import { StackItem, CheckType } from '../StackItem.js';
+export declare class CasesBeginItem extends BeginItem {
+    get kind(): string;
+    checkItem(item: StackItem): CheckType;
+}
+export declare class CasesTags extends AmsTags {
+    protected subcounter: number;
+    start(env: string, taggable: boolean, defaultTags: boolean): void;
+    autoTag(): void;
+    formatNumber(n: number, m?: number): string;
+}
+export declare const CasesMethods: {
+    NumCases(parser: TexParser, begin: CasesBeginItem): EqnArrayItem;
+    Entry(parser: TexParser, name: string): import("../Types.js").ParseResult;
+};
+export declare const CasesConfiguration: Configuration;