Old UI Mod / GOG related issues

It appears likely that we'll need a UI mod for the GOG old version of matsuri for both windows and linux.

I made a DLL for this, but we got this report from a player using it and the UI mod:

```
The GOG version is no longer crashing for me, but I have noticed a few issues which may or may not be exclusive to the GOG release:
-Font is Arial and not Trebuchet MS
-Japanese characters display as the character "X" (strings are XXXXX...)
-Text on the intermission UI (Read New Tips, Read All Tips, Save, Continue) disappears when highlighted with the mouse and does not reappear
-The base version of moon.png is used for the title screen (the one in the flashback folder more closely resembles the original VN)
I have not tested fragments yet as there is quite a bit to ctrl-skip through, but talksprites, lipsync, event CGs and effects like screenshake are all working
```

And another person confirmed.

First, is it true that this is UI mod territory?
Assuming so, what would it take to make a new UI mod for this version? Is this something that could be done quickly?

cc @drojf @ooa113y regarding whatever installer accomodations need to be made.

El issue describe problemas de fuentes, renderizado de texto y visualización de la interfaz de usuario específicos de la versión GOG del juego. Comience examinando el DLL de la modificación de interfaz de usuario existente y las carpetas de recursos del juego (como flashback) para comprender cómo se cargan las fuentes y las imágenes. Revise el código de la interfaz de usuario de intermisión para ver cómo se maneja el resaltado de texto. Determine qué modificaciones son necesarias para la compilación de GOG en Windows y Linux.

Escrito por el modelo de indexación a partir del texto del issue.