Making string struct a bit more simple and support only utf8.

Still just ascii for now but a bit easier to manager.
Use [..]A() functions from win api to not have to convert to wide char everywhere

JulietShaderCompiler/main.cpp

@@ -44,6 +44,6 @@ void Compile()
 
 int main(int argc, char* argv[])
 {
-    auto*  stream = IOFromFile(ConstString("bleeblou"), ConstString("w"));
+    auto*  stream = IOFromFile(ConstString("XF"), ConstString("w"));
     return 0;
 }