[Keyboard] Added a simple 2x5 Keypad with 4 layers (#6699)

[Keyboard] Added a simple 2x5 Keypad with 4 layers (#6699)

* Added new 2x5 Keypad with 3 LEDs to indicate the selected layer.  By Jonathan Cameron.

* Minor refactor from suggestions from qmk team

* Added

* Moved to 'handwired' directory

* Update readme.md

* Update readme.md

* Update readme.md

* Update keyboards/handwired/2x5keypad/readme.md

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Switch to image offsite

* Moved image offsite

* Update keyboards/handwired/2x5keypad/keymaps/default/keymap.h

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Update keyboards/handwired/2x5keypad/2x5keypad.h

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Moved functions into .c file per suggestions

* Cosmetic

* Fixed function called, per suggestions.

* Update keyboards/handwired/2x5keypad/2x5keypad.h

Ok

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* Moved LED functions to the top level since they can be used it various flavors

* Declare those moved LED functions!

* Update keyboards/handwired/2x5keypad/config.h

Co-Authored-By: Drashna Jaelre <drashna@live.com>