neoQWERTZ - macOS keylayout

Continuing the work from 0bstinate, this fork attempts to fix the remaining neo2 remnants in neoQWERTZ. Many layers and states are unchanged from the original neo2 bindings in the upstream keylayout file, resulting in an incorrect keymap.

Issues currently known and left to do:

• Layer 1 and 4 - symbols on keypad mismatched from upstream (Ebene 2)
• Layer 5 - mismatched from upstream (Ebene 5)
• Layer 6 - ??? - ??
• Layer 7 - cmd - sliiightly mismatched from layer 0
• Layer 8 - ctrl - ??
• Layer 9 - shift+ctrl - ??
• fix diacritics
• fix compose