[Keyboard] Monstargear XO87 Solderable support (#11716)

* Support for XO87 solderable version

* cleanup

* Remove abandoned code

* replaced KEYMAP with LAYOUT and moved LAYOUT macro to solderable.h.  deleted unneeded files.

* Update keyboards/monstargear/xo87/solderable/keymaps/via/keymap.c

* update info.json with missing keys

* Apply suggestions from code review

* Apply suggestions from code review

correct layout macro

keyboards/monstargear/xo87/solderable/config.h

@@ -0,0 +1,57 @@
+/* Copyright 2021 datafx
+ *
+ * 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 brightnessMax 8
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0x4D47 // MG for Monstargear
+#define PRODUCT_ID      0x5344 // SD for Soldered
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    Monstargear
+#define PRODUCT         XO87 Soldered
+
+/* key matrix size */
+#define MATRIX_ROWS 6
+#define MATRIX_COLS 16
+
+#define BACKLIGHT_PIN F0
+
+#define MATRIX_ROW_PINS { E6,E7,E3,B0,B1,A2}
+#define MATRIX_COL_PINS { C5,C3,C1,E1,D6,D2,B7,B3,F6,F7,F3,A5,A1,E2,C7,A6 }
+
+#define KEYLED_ROWS 6
+#define KEYLED_COLS 16
+#define KEYLED_ROW_PINS { E5,B4,B5,F0,C6,D5 }
+#define KEYLED_COL_PINS { C4,C2,C0,E0,D4,E4,B6,B2,F4,A0,F2,A4,F1,A7,D3,A3 }
+#define LED_DRIVER_LED_COUNT 93
+
+#define UNUSED_PINS
+#define DIODE_DIRECTION ROW2COL
+#define RGB_DI_PIN D7
+#define DRIVER_LED_TOTAL 21
+#define DRIVER_COUNT 2
+#define RGBLED_NUM 21
+#define RGBLIGHT_ANIMATIONS
+
+#define DEBOUNCE 5
+#define LOCKING_SUPPORT_ENABLE
+#define LOCKING_RESYNC_ENABLE
+
+#define BACKLIGHT_LEVELS 3