[Keyboard] Add Buzzard support (#15493)

* add buzzerd

(untested, WIP)

* configured linear actuator and fixed keymap

* configuration tweaks and added custom keymap

* add custom tapping term for home row mod

* added readme

* remove ionide folder

* added scroll function to trackpoint

* keymap reworked

* using one shot shift and removed dynamic macros

* reworked default keymap

* adapted to latest qmk changes

* remove caps word from default keymap

* use provided coding guidelines

* use get_highest_layer in favour  of biton32

* fixed formatting

* remove unnecessary define statement

keyboards/buzzard/rev1/config.h

@@ -0,0 +1,62 @@
+// Copyright 2021 Christoph Rehmann (crehmann)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID    0xFEED 
+#define PRODUCT_ID   0xB077
+#define DEVICE_VER   0x0001
+#define MANUFACTURER crehmann
+#define PRODUCT      Buzzard
+
+/* key matrix size */
+/* Rows are doubled up */
+#define MATRIX_ROWS  8
+#define MATRIX_COLS  6
+
+// wiring
+#define MATRIX_ROW_PINS \
+    { F4, F5, F6, F7 }
+#define MATRIX_COL_PINS \
+    { B1, B3, B2, B6, B5, B4}
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE        5
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+#define SOFT_SERIAL_PIN D2
+
+/* 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
+
+#ifdef OLED_ENABLE
+#define OLED_DISPLAY_128X32
+#define SPLIT_OLED_ENABLE
+#endif
+
+#ifdef PS2_USE_INT
+#define PS2_CLOCK_PIN   E6
+#define PS2_DATA_PIN    D7
+
+#define PS2_INT_INIT()  do {    \
+    EICRB |= ((1<<ISC61) |      \
+              (0<<ISC60));      \
+    } while (0)
+#define PS2_INT_ON()  do {      \
+     EIMSK |= (1<<INT6);        \
+} while (0)
+#define PS2_INT_OFF() do {      \
+    EIMSK &= ~(1<<INT6);        \
+} while (0)
+#define PS2_INT_VECT   INT6_vect
+#define PS2_MOUSE_ROTATE 270 /* Compensate for East-facing device orientation. */
+#endif