[Keyboard] Add ArcticPCB pre-Alpha support (#8479)

* Add initial ArcticPCB support

* Added README

* Solve info.json comma issue

* Apply suggestions from noroadsleft code review

Use the LAYOUT_60_tsangan_hhkb Community Layout

* Apply suggestions from tzarc

* Add license header to arctic.c, arctic.h and config.h

* Remove redundant tsangan keymap

* Remove tsangan compilation suggestion from readme

keyboards/acheron/arctic/config.h

@@ -0,0 +1,70 @@
+/*
+Copyright 2015 Álvaro "Gondolindrim" Volpato  <gondolindrim@acheronproject.com>
+
+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
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0x4150 // AP for AcheronProject
+#define PRODUCT_ID      0x4152 // AR for Arctic
+#define DEVICE_VER      0x0001 // Revision pre-Alpha
+#define MANUFACTURER    AcheronProject
+#define PRODUCT         ArcticPCB
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 14
+
+#define MATRIX_COL_PINS { B0, A5, A4, A3, A2, A1, A0, F1, F0, C15, C14, C13, B9, B8}
+#define MATRIX_ROW_PINS { B7, B6, A6, A7, B1}
+#define DIODE_DIRECTION COL2ROW
+
+//#define BACKLIGHT_PIN           A6
+//#define BACKLIGHT_PWM_DRIVER    PWMD3
+//#define BACKLIGHT_PWM_CHANNEL   1
+//#define BACKLIGHT_PAL_MODE      1
+//#define BACKLIGHT_LEVELS 6
+//#define BACKLIGHT_BREATHING
+//#define BREATHING_PERIOD 6
+
+/* define if matrix has ghost */
+//#define MATRIX_HAS_GHOST
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE    5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION