[Keyboard] Add Discipad, Update Zadig doc for USBaspLoader (#6771)

[Keyboard] Add Discipad, Update Zadig doc for USBaspLoader (#6771)

* add discipad

* Update driver_installation_zadig.md

* Update keyboards/coseyfannitutti/discipad/info.json

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Update keyboards/coseyfannitutti/discipad/readme.md

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Update rules.mk

* Update keyboards/coseyfannitutti/discipad/rules.mk

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Update docs/driver_installation_zadig.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Update keyboards/coseyfannitutti/discipad/discipad.c

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Update docs/driver_installation_zadig.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Update docs/driver_installation_zadig.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Update rules.mk

* Update discipad.c

* Update driver_installation_zadig.md

* Update config.h