AMJ60 Refactor (#13530)

* rename LAYOUT to LAYOUT_all

* refactor default keymap

- add license header
- use layer_names enum
- use LAYOUT_all macro
- update keymap to be more generic
- use QMK-native keycode aliases

* info.json: human-friendly formatting

* convert LAYOUT_iso into a proper LAYOUT_60_iso

* LAYOUT_all bugfix

In the physical sense, position k3d is to the left of k3c.

* rework LAYOUT_max into LAYOUT_60_ansi_split_bs_rshift

* remove LAYOUT_iso_splitrshift and iso_split_rshift keymap

* rework LAYOUT_hhkb into LAYOUT_60_hhkb

* amj60.h cleanup

- add license header
- use #pragma once include guard
- concatenate layout block comments
- remove unnecessary function headers

* add license header to amj60.c

* align config.h to QMK template

* align rules.mk to QMK template

* enable Community Layout support

* modernize readme.md

- add PCB image
- convert keyboard data to list
- add flashing and bootloader instructions
- update Docs links

keyboards/amj60/config.h

@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #include "config_common.h"
 
@@ -31,46 +30,69 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 5
 #define MATRIX_COLS 14
 
-// ROWS: Top to bottom, COLS: Left to right
-
-#define MATRIX_ROW_PINS { F7, F6, F5, F4, D5}
-#define MATRIX_COL_PINS { F1, F0, E6, C7, C6, B0, D4, B1, B7, B5, B4, D7, D6, B3}
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { F7, F6, F5, F4, D5 }
+#define MATRIX_COL_PINS { F1, F0, E6, C7, C6, B0, D4, B1, B7, B5, B4, D7, D6, B3 }
 #define UNUSED_PINS
 
-/* COL2ROW or ROW2COL */
+/* COL2ROW, ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
 #define LED_CAPS_LOCK_PIN B2
 #define LED_PIN_ON_STATE 0
 
 #define BACKLIGHT_PIN B6
+#define BACKLIGHT_LEVELS 4
+#define BACKLIGHT_BREATHING
 
+#define RGB_DI_PIN E2
+#ifdef RGB_DI_PIN
+#    define RGBLED_NUM 8
+#    define RGBLIGHT_HUE_STEP 10
+#    define RGBLIGHT_SAT_STEP 17
+#    define RGBLIGHT_VAL_STEP 17
+//#    define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+//#    define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+/*== all animations enable ==*/
+#    define RGBLIGHT_ANIMATIONS
+/*== or choose animations ==*/
+//#    define RGBLIGHT_EFFECT_BREATHING
+//#    define RGBLIGHT_EFFECT_RAINBOW_MOOD
+//#    define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//#    define RGBLIGHT_EFFECT_SNAKE
+//#    define RGBLIGHT_EFFECT_KNIGHT
+//#    define RGBLIGHT_EFFECT_CHRISTMAS
+//#    define RGBLIGHT_EFFECT_STATIC_GRADIENT
+//#    define RGBLIGHT_EFFECT_RGB_TEST
+//#    define RGBLIGHT_EFFECT_ALTERNATING
+/*== customize breathing effect ==*/
+/*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//#    define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+/*==== use exp() and sin() ====*/
+//#    define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+//#    define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+#endif
 
-/* define if matrix has ghost */
-//#define MATRIX_HAS_GHOST
-
-/* Set 0 if debouncing isn't needed */
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
 #define DEBOUNCE 5
 
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
 
-/* Backlight configuration
- */
-#define BACKLIGHT_LEVELS 4
-
-/* Underlight configuration
- */
-
-#define RGB_DI_PIN E2
-#define RGBLIGHT_ANIMATIONS
-#define RGBLED_NUM 8     // Number of LEDs
-#define RGBLIGHT_HUE_STEP 10
-#define RGBLIGHT_SAT_STEP 17
-#define RGBLIGHT_VAL_STEP 17
-
 /*
  * Feature disable options
  *  These options are also useful to firmware size reduction.
@@ -86,7 +108,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_LAYER
 //#define NO_ACTION_TAPPING
 //#define NO_ACTION_ONESHOT
-//#define NO_ACTION_MACRO
-//#define NO_ACTION_FUNCTION
 
-#endif
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+
+/* Bootmagic Lite key configuration */
+//#define BOOTMAGIC_LITE_ROW 0
+//#define BOOTMAGIC_LITE_COLUMN 0