[Keyboard] Add KBD67 Hotswap Support (#4916)

* initial commit

* move the original kbd67 stuff into its own directory, rev1

* get rid of vanilla cookie cutter code

* put in the switch matrix pins, backlight pin, and rgb underglow pin. Number of underglow LEDs is questionable.

* switch matrix created for hotswap

* create a basic keymap for testing

* make info.json for QMK Configurator support

* rename kbd67 due to compile error

* kbd67 generic readme file

* fix make instructions for the new rev1

* comment out unneeded rgb light #defines

* Update keyboards/kbd67/readme.md

Add an extra space for proper markdown rendering

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>

* Update keyboards/kbd67/hotswap/hotswap.h

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>

* Update keyboards/kbd67/hotswap/keymaps/default/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>

* use pragma once

* proper format of MechMerlin

3 files changed, 85 insertions, 0 deletions

diff --git a/keyboards/kbd67/hotswap/keymaps/default/config.h b/keyboards/kbd67/hotswap/keymaps/default/config.h
new file mode 100644
index 0000000000..26c6d6ade1
--- /dev/null
+++ b/keyboards/kbd67/hotswap/keymaps/default/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2019 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/>.
+ */
+
+#pragma once
+
+// place overrides here
diff --git a/keyboards/kbd67/hotswap/keymaps/default/keymap.c b/keyboards/kbd67/hotswap/keymaps/default/keymap.c
new file mode 100644
index 0000000000..d9c1e1ebbd
--- /dev/null
+++ b/keyboards/kbd67/hotswap/keymaps/default/keymap.c
@@ -0,0 +1,65 @@
+/* Copyright 2019 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
+
+// Defines the keycodes used by our macros in process_record_user
+enum custom_keycodes {
+  QMKBEST = SAFE_RANGE,
+  QMKURL
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[0] = LAYOUT(
+  KC_ESC,  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_BSPC,  KC_HOME, \
+  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_LCTL, 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_LGUI, KC_LALT,                KC_SPC,                          KC_RALT, MO(1),            KC_LEFT, KC_DOWN, KC_RGHT),
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case QMKBEST:
+      if (record->event.pressed) {
+        // when keycode QMKBEST is pressed
+        SEND_STRING("QMK is the best thing ever!");
+      } else {
+        // when keycode QMKBEST is released
+      }
+      break;
+    case QMKURL:
+      if (record->event.pressed) {
+        // when keycode QMKURL is pressed
+        SEND_STRING("https://qmk.fm/" SS_TAP(X_ENTER));
+      } else {
+        // when keycode QMKURL is released
+      }
+      break;
+  }
+  return true;
+}
+
+void matrix_init_user(void) {
+
+}
+
+void matrix_scan_user(void) {
+
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}
diff --git a/keyboards/kbd67/hotswap/keymaps/default/readme.md b/keyboards/kbd67/hotswap/keymaps/default/readme.md
new file mode 100644
index 0000000000..7e681294f2
--- /dev/null
+++ b/keyboards/kbd67/hotswap/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for hotswap