[Keyboard] MountainBlocks MB17 (#8554)

* initial commit

* preliminary support for mb17 using the qmk default keymap

* add the VIA keymap

* add qmk configurator support

* code cleanups before submission

* Update keyboards/mountainblocks/mb17/rules.mk

* Update keyboards/mountainblocks/mb17/info.json

* remove file

keyboards/mountainblocks/mb17/keymaps/default/keymap.c

@@ -0,0 +1,60 @@
+/* Copyright 2020 mechmerlin
+ *
+ * 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] = {
+    /*
+     * ┌───┬───┬───┬───┐
+     * │TG1│ / │ * │ - │
+     * ├───┼───┼───┼───┤
+     * │ 7 │ 8 │ 9 │   │
+     * ├───┼───┼───┤ + │
+     * │ 4 │ 5 │ 6 │   │
+     * ├───┼───┼───┼───┤
+     * │ 1 │ 2 │ 3 │   │
+     * ├───┴───┼───┤Ent│
+     * │   0   │ . │   │
+     * └───────┴───┴───┘
+     */
+    [0] = LAYOUT_numpad_5x4(
+        TG(1),   KC_PSLS, KC_PAST, KC_PMNS,
+        KC_P7,   KC_P8,   KC_P9,
+        KC_P4,   KC_P5,   KC_P6,   KC_PPLS,
+        KC_P1,   KC_P2,   KC_P3,
+        KC_P0,   KC_PDOT,          KC_PENT
+    ),
+
+    /*
+     * ┌───┬───┬───┬───┐
+     * │TG1│ / │ * │ - │
+     * ┌───┬───┬───┐───┤
+     * │Hom│ ↑ │PgU│   │
+     * ├───┼───┼───┤ + │
+     * │ ← │   │ → │   │
+     * ├───┼───┼───┤───┤
+     * │End│ ↓ │PgD│   │
+     * ├───┴───┼───┤Ent│
+     * │Insert │Del│   │
+     * └───────┴───┘───┘
+     */
+    [1] = LAYOUT_numpad_5x4(
+        _______, _______, _______, _______,
+        KC_HOME, KC_UP,   KC_PGUP,
+        KC_LEFT, XXXXXXX, KC_RGHT, _______,
+        KC_END,  KC_DOWN, KC_PGDN,
+        KC_INS,           KC_DEL,  _______
+    )
+};