mkxp-z for Android

This is port of mkxp-z to Android.

Currently, it's almost works properly (likely, experemental), but enough to have running RPG Maker XP, VX and VX Ace games.

Running mkxp-z on Android

0. Build mkxp-z application (TODO: make tutorial or public release)
1. Install APK on your Android device
2. Create mkxp-z folder on internal storage (e.g. /storage/emulated/0/mkxp-z)
3. You can put custom mkxp-z config (mkxp.json) in mkxp-z folder (e.g. preload scripts or change game directory to load game from external storage)
4. Copy game files into folder mkxp-z (or to other game folder that defined in your mkxp.json)
5. Run mkxp-z, grant access to storage, and have fun, I think?

Known issues

• You can't write saves/files in external storage (such as SD Card) on lower than Android 10 (On Android 11+ granting All Files Access means You can write on external storages)

To Do...

• mkxp-z Android compilation tutorial on GitHub Wiki page
• Fix compile Ruby extensions in Windows MSYS2 environment
• ...and much more, I think?