[Keyboard] Update 1upkeyboards/super16 with code from vendor (#5645)

[Keyboard] Update 1upkeyboards/super16 with code from vendor (#5645)

* readme formatting

* cleanup rules.mk

* update config.h

* add numpad layout

* Update default keymap

* cleanup rules

* disable console and commands to fit the bootloader

* cleanup whitespace

* revert readme changes

* revert changes to config.h

* remove unused keycodes

* add LAYOUTS to rules.mk

* remove redundant config setting

Co-Authored-By: jeffmhastings <jeffmhastings@gmail.com>