Crawlpad refactor (#4854)

* Crawlpad: delete kbfirmware JSON file

* Crawlpad: refactor

- config.h and crawlpad.h updated to use #pragma once method
- layout macro renamed from KEYMAP to LAYOUT_ortho_4x4
- default keymap now uses #include QMK_KEYBOARD_H
- deleted deprecated action_get_macro function
- cleanup rules.mk file
- add LAYOUTS = ortho_4x4 to rules.mk

* Crawlpad: Configurator support

* Crawlpad: readme update

- update image link to direct link
- fully update Docs link line
- delete reference to deleted kbfirmware JSON file

keyboards/crawlpad/crawlpad.h

@@ -1,9 +1,8 @@
-#ifndef KB_H
-#define KB_H
+#pragma once
 
 #include "quantum.h"
 
-#define KEYMAP( \
+#define LAYOUT_ortho_4x4( \
 	K00, K01, K02, K03, \
 	K10, K11, K12, K13, \
 	K20, K21, K22, K23, \
@@ -15,4 +14,3 @@
 	{ K30,   K31,   K32,   K33 }  \
 }
 
-#endif