[Keymap] add simple gmmk pro macos keymap with rgb (#13504)

keyboards/gmmk/pro/keymaps/alexmarmon/keymap.c

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+/* Copyright 2021 Glorious, LLC <[email protected]>
+   Copyright 2021 alexmarmon
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+//      ESC      F1       F2       F3       F4       F5       F6       F7       F8       F9       F10      F11      F12	     Prt           Rotary(Mute)
+//      ~        1        2        3        4        5        6        7        8        9        0         -       (=)	     BackSpc           Del
+//      Tab      Q        W        E        R        T        Y        U        I        O        P        [        ]        \                 PgUp
+//      Caps     A        S        D        F        G        H        J        K        L        ;        "                 Enter             PgDn
+//      Sh_L              Z        X        C        V        B        N        M        ,        .        ?                 Sh_R     Up       End
+//      Ct_L     Alt_L    Win_L                               SPACE                               Ct_R        Alt_R   FN     Left     Down     Right
+
+
+    // The FN key by default maps to a momentary toggle to layer 1 to provide access to the RESET key (to put the board into bootloader mode). Without
+    // this mapping, you have to open the case to hit the button on the bottom of the PCB (near the USB cable attachment) while plugging in the USB
+    // cable to get the board into bootloader mode - definitely not fun when you're working on your QMK builds. Remove this and put it back to KC_RGUI
+    // if that's your preference.
+    //
+    // To put the keyboard in bootloader mode, use FN+backslash. If you accidentally put it into bootloader, you can just unplug the USB cable and
+    // it'll be back to normal when you plug it back in.
+    [0] = LAYOUT(
+        KC_ESC,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_PSCR,          KC_MUTE,
+        KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,  KC_BSPC,          KC_DEL,
+        KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC, KC_RBRC, KC_BSLS,          KC_PGUP,
+        KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,          KC_ENT,           KC_PGDN,
+        KC_LSFT,          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,          KC_RSFT, KC_UP,   KC_END,
+        KC_LCTL, KC_LALT, KC_LGUI,                            KC_SPC,                             KC_RCTL, KC_RALT,   MO(1), KC_LEFT, KC_DOWN, KC_RGHT
+    ),
+
+    [1] = LAYOUT(
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RESET,            RGB_MODE_FORWARD,
+        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______,          RGB_MODE_REVERSE,
+        _______,          _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______, _______, RGB_TOG,
+        _______, _______, _______,                            _______,                            _______, _______, _______, KC_MEDIA_PREV_TRACK, _______, KC_MEDIA_NEXT_TRACK
+    ),
+
+
+};
+
+
+bool encoder_update_user(uint8_t index, bool clockwise) {
+    if (clockwise) {
+      tap_code(KC_VOLU);
+    } else {
+      tap_code(KC_VOLD);
+    }
+    return true;
+}

keyboards/gmmk/pro/keymaps/alexmarmon/readme.md

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+![Layout Image](https://i.imgur.com/MizMvsI.jpg)
+
+# Simple MacOS like keymap with RGB
+
+* Working basic RGB thanks to https://github.com/qmk/qmk_firmware/pull/13430
+* Restore working rotary knob volume control
+* Add media_previous and media_next to FN+left and FN+right