[UG1] Implement in-game configurator

[xan1242]

This screenshot is the current status as of commit https://github.com/xan1242/NFSU-XtendedInput/commit/3ba9d4ee175db521a11ed41bbe20b2463cd90370

As of now, it only displays current settings and not much more.

What's left to do:

• PlayStation strings
• Keyboard strings & map to name conversion
• And finally, actual remapping & saving to the INI (a spot for this is stubbed in HandleInGameConfigMenu())

This menu normally supports up to 6 devices with 3 different types: keyboards, joypads and wheels.

I'm only focusing on the first two, as is the intent of this plugin. As such, index 0 will be hardcoded to the keyboard input, and index 1 will be hardcoded to the joypad input.

[xan1242]

Implemented in: https://github.com/xan1242/NFSU-XtendedInput/commit/ae46cd8a3b61dfa712eb5eb56b903c23e69856b0

Currently it works, with the caveat that it doesn't support 2 mappings and it's limited to what's shown on the screen.