K.O.Y and German layout for several boards (#14991)

* Added accent.

* Added keymap for 5x6 dactyl manuform on KOY layout

* Added xd75 folder that is not in the main repo anymore?

* Added keymap for naked48 on KOY layout

* Added keymap for splitreus62 on KOY layout

* Added keymap for Dactyl Manuform 4x6 with RGB LEDs and K.O,Y layout

* Fixed error where handedness was not correctly determined because of combining vbus pins of both controllers.

* Replaced dynamic macros bith backspace and delete.

* Changed detecting handedness from detecting usb communication to checking a wired pin. This avoids problems when booting the PC, where VBUS is already high, but no communication is happening -> both halves think they are not master.

* Update keyboards/handwired/dactyl_manuform/4x6/keymaps/scheiklp/rules.mk

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/naked48/keymaps/scheiklp/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/naked48/keymaps/scheiklp/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/naked48/keymaps/scheiklp/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keymap.c

Added copyright

* Update config.h

* Update rules.mk

* Updated files according to PR requests.

* Update keyboards/xd75/config.h

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/xd75/config.h

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/xd75/keymaps/default/keymap.c

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Update keyboards/xd75/config.h

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Removed duplicate code. Updated copyright info.

* Restored readme

Co-authored-by: Drashna Jaelre <drashna@live.com>

users/scheiklp/koy_keys_on_quertz_de_latin1.h

@@ -61,3 +61,4 @@ Additionally, there are some common chars that we dit not yet define:
 #define N_COPY LCTL(KC_C) // CTRL+C
 #define N_CUT LCTL(KC_X) // CTRL+X
 #define N_UNDO LCTL(N_Z) // CTRL+Z
+#define N_ACUT KC_EQL  // ´