Add more combinators and lang

Author: disnet

debug.js

@@ -0,0 +1,9 @@
+import lang, { lex } from './src/lang';
+import ContextWithHoles from './src/context-with-holes';
+
+let { a } = lang`
+  a = '\n';
+`;
+
+a.tryParse('a');
+// console.dir(r);