add initial marp implementation with sample content and build configuration

node_modules/speech-rule-engine/mjs/semantic_tree/semantic.js

@@ -0,0 +1,12 @@
+import * as DomUtil from '../common/dom_util.js';
+import { SemanticTree } from './semantic_tree.js';
+export function xmlTree(mml) {
+    return getTree(mml).xml();
+}
+export function getTree(mml) {
+    return new SemanticTree(mml);
+}
+export function getTreeFromString(expr) {
+    const mml = DomUtil.parseInput(expr);
+    return getTree(mml);
+}