[Keyboard] add top40 keyboard. (#21199)

Co-authored-by: Less/Rikki <86894501+lesshonor@users.noreply.github.com>

keyboards/akko/top40/keymaps/default/keymap.c

@@ -0,0 +1,37 @@
+/* Copyright (C) 2023 jonylee@hfd
+ *
+ * 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
+// clang-format off
+enum __layers {
+    _Base,
+    _FN
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [_Base] = LAYOUT( /* Base */
+		KC_ESC,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+		KC_TAB,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_ENT,
+		KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_UP,   KC_RSFT,
+		KC_LCTL, KC_LGUI, KC_LALT,     KC_SPC,               KC_SPC,          MO(_FN),KC_LEFT, KC_DOWN, KC_RGHT),
+
+    [_FN] = LAYOUT( /* Fn */
+		_______, KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_DEL,
+		_______, _______, _______, _______, _______, _______, KC_PGUP, KC_PGDN, KC_HOME, KC_END,  RGB_TOG, RGB_MOD,
+		_______, _______, _______, KC_CALC, _______, AG_TOGG, _______, KC_MUTE, KC_VOLD, KC_VOLU, RGB_VAI, _______,
+		_______, GU_TOGG, _______,          _______,          _______,          _______, RGB_SPI, RGB_VAD, RGB_SAI)
+};