Keyboard: Adding the AT101 PCB (#3785)

* Adding the AT101 PCB firmware

* Fixed AT101 keymap error

* Fixing AT101 firmware

* More Fixes for AT101 firmware

* Rename AT101_Blackheart.c to at101_blackheart.c

* Rename AT101_Blackheart.h to at101_blackheart.h

* Update readme.md

* Renaming AT101 folder pt1

* Renaming AT101 folder pt2

* Fixing AT101 LED function name

* Redoing AT101 folder naming pt2

Last round had issues, should be the last rename.

* Fixing missing comma in at101_blackheart.h

keyboards/at101_blackheart/config.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x6060
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    blindassassin111
+#define PRODUCT         AT101_Blackheart PCB
+#define DESCRIPTION     Replacement AT101 PCB
+
+/* key matrix size */
+#define MATRIX_ROWS 12
+#define MATRIX_COLS 10
+
+/* key matrix pins */
+#define MATRIX_ROW_PINS { F0, F1, F4, D4, F6, F5, F7, B6, B5, D5, C7, C6 }
+#define MATRIX_COL_PINS { D1, D0, B7, B3, B2, B1, B0, E6, D2, D3 }
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCING_DELAY 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
+
+/* force n-key rollover*/
+#define FORCE_NKRO
+
+/* key combination for command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
+)
+
+/* prevent stuck modifiers */
+#define PREVENT_STUCK_MODIFIERS