refactor: finish rust parse and add testbench for it.

src/yycc/rust/stringify.hpp

@@ -0,0 +1,10 @@
+#pragma once
+#include "../string/stringify.hpp"
+
+namespace yycc::rust::stringify {
+
+    // There is no modification for legacy "stringify" functions like "parse".
+    // So we simply expose all functions into this namespace.
+    using namespace ::yycc::string::stringify;
+
+} // namespace yycc::rust::stringify