Keyboard: Add default keymap for dactyl_manuform 5x6 (#3649)

* mouse layer keys shifted

* mouse layer keys shifted

* manuform 5x6 added

* mouse layer keys shifted

* manuform 5x6 added

* dactyl_manuform 5x6 keymap added

* reorg. dactyl manuform folder

* removed LAYOUTS = ortho_4x12 for 4x5

* Rows and Cols in config.h fixed

* MASTER_LEFT

* 5x6 matrix fixed

* keymap updated

* removed the i2c, serial, split_util and matrix files and inserted SPLIT_KEYBOARD

* default keymap for dactyl_manuform 5x6

* Fixes for Dactyl Manuform

* Add/update default keymap

keyboards/handwired/dactyl_manuform/dactyl_manuform.h

@@ -0,0 +1,22 @@
+#pragma once
+
+
+#ifdef KEYBOARD_handwired_dactyl_manuform_5x6
+    #include "5x6.h"
+#elif KEYBOARD_handwired_dactyl_manuform_4x5
+    #include "4x5.h"
+#endif
+
+//void promicro_bootloader_jmp(bool program);
+#include "quantum.h"
+
+
+#ifdef USE_I2C
+#include <stddef.h>
+#ifdef __AVR__
+	#include <avr/io.h>
+	#include <avr/interrupt.h>
+#endif
+#endif
+
+