[Keyboard] add at6 keyboard (#17346)

Co-authored-by: zvecr <git@zvecr.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/atset/at6/keymaps/default/keymap.c

@@ -0,0 +1,39 @@
+/*
+ * 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] = {
+
+
+[0] = LAYOUT(
+  KC_7,    KC_8,    KC_9,
+  KC_4,    KC_5,    KC_6
+),
+
+	
+[1] = LAYOUT(
+  KC_NO,   KC_NO,   KC_NO,
+  KC_NO,   KC_NO,   KC_NO
+),
+
+	
+[2] = LAYOUT(
+  KC_NO,   KC_NO,   KC_NO,
+  KC_NO,   KC_NO,   KC_NO
+)
+
+
+};