Add support for Rance 2 Hint Disk

[kichikuou]

The NACT_Sys1 changes were contributed by @RottenBlock.

To get this to work, you need to put the followings in the current directory:

• all the .DAT files for Rance 2,
• GDISK.DAT/GCG.DAT from the hint disk, and
• AG00.DAT from the hint disk renamed to GG00.DAT

And run system3 with the game id rance2_hint.

Remaining issue:

• The positions of message box and menu must be adjusted.

[kichikuou]

I'm only testing it on the Japanese version.

@RottenBlock Since I've made system3 read GDISK.DAT and GG00.DAT, your test environment may need to be adjusted.

[RottenBlock]

Ah, my bad, I forgot to include ags.cpp in my zip, so the message and dialog boxes got left out. Here's what I originally put:

case CRC32_RANCE2:
case CRC32_RANCE2_HINT:
SET_TEXT(i, 8, 285, 502, 396, true);
SET_MENU(i, 431, 19, 624, 181, true);
break;

That said, here are some screenshots of the hint disk running in Neko Project for comparison's sake, in case we wanted to get even more accurate:

https://imgur.com/a/0qqIzRV

[kichikuou]

Great, added it to this PR (I changed the last argument to false to not draw a frame around the menu).

Are there any concerns left, including about the code I added? If not, I will merge this and publish a new release.

[RottenBlock]

Oh, good thinking about the border. I forgot that was a thing. I tried changing the color to replicate the effect but the palette's cyan isn't the same as the PC-98's. Your solution's superior here, I think.

I don't have any other major concerns, I think you can run with it!

[kichikuou]

Released as v1.4.0.