started implementing dynamic widget allocation by xml tag

engine/util.hpp

@@ -0,0 +1,8 @@
+#pragma once
+
+uint16_t constexpr const_hash(char const *input)
+{
+    return *input ?
+    static_cast<uint16_t>(*input) + 33 * const_hash(input + 1) :
+    5381;
+}