add initial marp implementation with sample content and build configuration

node_modules/yargs/helpers/index.js

@@ -0,0 +1,14 @@
+const {
+  applyExtends,
+  cjsPlatformShim,
+  Parser,
+  processArgv,
+} = require('../build/index.cjs');
+
+module.exports = {
+  applyExtends: (config, cwd, mergeExtends) => {
+    return applyExtends(config, cwd, mergeExtends, cjsPlatformShim);
+  },
+  hideBin: processArgv.hideBin,
+  Parser,
+};