New board: Elecrow CrowPanel Basic 2.8" (#225)

- Implemented Elecrow CrowPanel Basic 2.8"
- Change default "invert" setting for ILI934x driver from `true` to `false`
- Created `Xpt2046` driver subproject
- Refactored unPhone to use new `Xpt2046` driver subproject

Boards/ElecrowCrowpanelBasic28/Source/hal/CrowPanelDisplay.cpp

@@ -0,0 +1,28 @@
+#include "CrowPanelDisplay.h"
+#include "CrowPanelDisplayConstants.h"
+#include "CrowPanelTouch.h"
+#include "Ili934xDisplay.h"
+
+#include <PwmBacklight.h>
+
+#include <Tactility/Log.h>
+
+#define TAG "crowpanel_display"
+
+std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
+    auto touch = createTouch();
+
+    auto configuration = std::make_unique<Ili934xDisplay::Configuration>(
+        CROWPANEL_LCD_SPI_HOST,
+        CROWPANEL_LCD_PIN_CS,
+        CROWPANEL_LCD_PIN_DC,
+        240,
+        320,
+        touch
+    );
+
+    configuration->mirrorX = true;
+    configuration->backlightDutyFunction = driver::pwmbacklight::setBacklightDuty;
+
+    return std::make_shared<Ili934xDisplay>(std::move(configuration));
+}