[Keyboard] Add ISO Macro keyboard (#11517)

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Co-authored-by: online <33636898+online@users.noreply.github.com>

keyboards/merge/iso_macro/config.h

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+ /* Copyright 2021 duoshock 
+  * 
+  * 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/>.
+  */ 
+
+#pragma once
+
+#include "config_common.h"
+
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x1200
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    Merge
+#define PRODUCT         ISO Macro
+
+/* key matrix size */
+#define MATRIX_ROWS 3
+#define MATRIX_COLS 3
+
+#define MATRIX_ROW_PINS { F4, F5, F6}
+#define MATRIX_COL_PINS { B4, B5, B6}
+#define UNUSED_PINS
+#define BACKLIGHT_PIN B7
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+
+#define ENCODERS_PAD_A { F0, D0 }
+#define ENCODERS_PAD_B { F1, D1 }
+#define ENCODER_RESOLUTION 4