Keyboard: Chimera Ortho refactor (#4652)

Keyboard: Chimera Ortho refactor (#4652)

* Layout macro refactor

- Renamed KC_KEYMAP to LAYOUT_kc
- Renamed KEYMAP to LAYOUT
- moved LAYOUT above LAYOUT_kc (Hoping this encourages users to use LAYOUT.)
- updated layout macro name in info.json
- white space changes for readability

* Keymap refactor: default

Default keymap now uses `#include QMK_KEYBOARD_H` and LAYOUT macro (from KC_KEYMAP/LAYOUT_kc). Keymap was also refactored to use process_record_user function instead of deprecated action_get_macro from TMK.

Also moved LONGPRESS_DELAY and LAYER_TOGGLE_DELAY definitions to config.h.

* Keymap refactor: dcompact

- Changed chimera_ortho.h include for QMK_KEYBOARD_H
- Updated layout name on keymap layers

* Coding conventions fix in default keymap

* Keymap refactor: gordon

- Changed chimera_ortho.h include for QMK_KEYBOARD_H
- Removed redundant includes of action_layer.h and process_tap_dance.h (superseded by QMK_KEYBOARD_H)
- Removed redundant definitions for KC_NO and KC_TRNS
- Updated layout name on keymap layers