handwired/magicforce68: refactor, Configurator support, and readme cleanup (#5234)

handwired/magicforce68: refactor, Configurator support, and readme cleanup (#5234)

* handwired/magicforce68: refactor

- layout macro KEYMAP renamed to LAYOUT
- keymap now uses #include QMK_KEYBOARD_H
- keymap now uses non-auto-prepended keycodes per QMK standard.
- deleted deprecated and unused action_get_macro block from default
keymap.

* handwired/magicforce68: Configurator support

* handwired/magicforce68: readme cleanup

- updated to current QMK template
- rename file to lowercase
- fix make commands
- Add Docs links