A tweaked keymap for Redox

This keymap modifies the default keymap for the awesome Redox keyboard designed by Mattia Dal Ben.

Also heavily inspired by nrichers layout.

Changes to the default keymap

These keymap changes are meant to improve the usability of the layout in everyday use:

Move GUI (SUPER) key to where default left CTRL is
Move /? into usual location next to right SHIFT - the default flash from Falbatech put \| here (might not be the Redox default?), which felt unintuitive
Put \| into bottom-left spot where GUI (SUPER) was - had to go somewhere and this bottom-left placement sort of balances with the almost bottom-right /?
Change default ESC into ESC on tap, CTRL on hold - Love the UNIX-ey CTRL key location and wanted to keep ESC in the original position
Change default ' above right SHIFT into ' on tap, CTRL on hold - Love the UNIX-ey CTRL key location, but it can give you 'left claw hand', which a second, mirrored CTRL key fixes
Add F11 and F12 keys to two layers - needed on macOS if you want to control volume up and down from your keyboard (not shown, on a different layer)S