A personal layout for the orthodox keyboard (#3006)

A personal layout for the orthodox keyboard (#3006)

* A personal layout for the orthodox keyboard

* Added layout readme.md

* Consolidated inclues with #include QMK_KEYBOARD_H

* Moved layer tones setup to config.h

* Replace persistent_default_layer_set calls with set_single_persistent_default_layer

* Simplified the process_record_user function using layer_state_set_user function and MO() to set the lower, raise, nav and media layers

* Removed AUDIO_ENABLE ifdefs and persistent_default_layer_set() as they are not needed any more