add heltec-v4-r8 board (#10268)

* add heltec-v4-r8 board

* Fixed default SPI pin and macro definition errors.

* update platformio.ini according device-ui LGFX display definitions

Co-authored-by: Copilot <copilot@github.com>

* fix commit reference

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: mverch67 <manuel.verch@gmx.de>
Co-authored-by: Copilot <copilot@github.com>
Co-authored-by: Manuel <71137295+mverch67@users.noreply.github.com>

variants/esp32s3/heltec_v4/platformio.ini

@@ -89,8 +89,10 @@ build_flags =
   -D VIEW_240x320
   -D DISPLAY_SET_RESOLUTION
   -D DISPLAY_SIZE=240x320 ; portrait mode
+  -D LGFX_SPI_3WIRE=true
   -D LGFX_PIN_SCK=17
   -D LGFX_PIN_MOSI=33
+  -D LGFX_PIN_MISO=-1
   -D LGFX_PIN_DC=16
   -D LGFX_PIN_CS=15
   -D LGFX_PIN_BL=21
@@ -123,7 +125,7 @@ build_flags =
   -D SCREEN_TRANSITION_FRAMERATE=5
   -D BRIGHTNESS_DEFAULT=130 ; Medium Low Brightness
   -D HAS_TOUCHSCREEN=1
-  -D TOUCH_I2C_PORT=0
+  -D TOUCH_I2C_PORT=1
   -D TOUCH_SLAVE_ADDRESS=0x2E
   -D SCREEN_TOUCH_INT=TOUCH_INT_PIN
   -D SCREEN_TOUCH_RST=TOUCH_RST_PIN