Need app-specific FAQ for some common artist programs

[gonX]

Linux:

• Native:
  • [x] GIMP (#59)
  • [x] Krita (works out of the box, at least on Wayland)
• WINE:
  • [ ] Photoshop
  • [ ] Krita (Does not work, no known workarounds, see link)
• more?

Windows:

• [x] Photoshop
• [x] GIMP
• [x] Krita
• more?

MacOS:

• more?

For Windows, this involves changing the program to use the Windows Ink API. On Linux, this usually always just works when in artist mode, but e.g. GIMP needs some help (especially on Wayland).

The articles should (mostly) assume the user already has working pressure elsewhere, ie. Windows Ink or Artist Mode is already set up. An example can be seen in #59

Relevant discussion: https://github.com/OpenTabletDriver/OpenTabletDriver/discussions/1247#discussioncomment-1525937

[gonX]

For anyone implementing this who is familiar with the existing procedures, there is a discovery with Photoshop where a reinstall is likely no longer needed:

Photoshop already had PSUserConfig.txt in it was "UseSystemStylus 0" command

implying that UseSystemStylus 1 will use WinInk

Discord reference

[gonX]

Krita on Linux just works as long as Artist Mode is used

[gonX]

WINE/Linux simulates Wintab, so under Xwayland it should be grabbing the Xwayland devices which are tested working in other applications (e.g. GIMP) and work correctly, though this needs testing.

/edit: Krita under WINE sees Xwayland tablets as mouse events. It is likely it's seeing the Xwayland mouse events first, guessing based on the fact that GIMP lists the Xwayland mouse before the stylus and eraser.

[gonX]

Reopening since #92 is only a partial fix