Add variant for Waveshare ESP32 board.

Variant for https://www.waveshare.com/wiki/ESP32-S3-Touch-LCD-1.28

variants/waveshare_esp32s3_touch_lcd_128/pins_arduino.h

@@ -0,0 +1,37 @@
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+
+#define USB_VID            0x1A86
+#define USB_PID            0x55D3
+#define USB_MANUFACTURER   "Waveshare"
+#define USB_PRODUCT        "ESP32-S3 Touch LCD 1.28"
+#define USB_SERIAL         "" // Empty string for MAC adddress
+
+#define LCD_BACKLIGHT  2
+#define LCD_DC         8
+#define LCD_RST        14
+
+#define TP_INT 5
+#define TP_RST 13
+
+#define IMU_INT1 4
+#define IMU_INT2 3
+
+static const uint8_t TX = 43;
+static const uint8_t RX = 44;
+#define TX1 TX
+#define RX1 RX
+
+static const uint8_t SCL = 7;
+static const uint8_t SDA = 6;
+
+static const uint8_t SS    = 9;
+static const uint8_t MOSI  = 11;
+static const uint8_t MISO  = 12;
+static const uint8_t SCK   = 10;
+
+static const uint8_t A0 = 1; // Connected through voltage divider to battery pin
+
+#endif /* Pins_Arduino_h */