New board: Elecrow CrowPanel Avance 2.8" (#224)

- Added new board
- Extracted ST7789 driver and backlight PWM driver into separate subprojects
- Refactored T-Deck to use the shared driver modules
- Fix bug in WiFi service: searching for APs was broken

Boards/ElecrowCrowpanelAdvance28/Source/hal/CrowPanelDisplay.cpp

@@ -0,0 +1,27 @@
+#include "CrowPanelDisplay.h"
+#include "CrowPanelDisplayConstants.h"
+#include "CrowPanelTouch.h"
+
+#include <St7789Display.h>
+#include <PwmBacklight.h>
+
+#include <Tactility/Log.h>
+
+#define TAG "crowpanel_display"
+
+std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
+    auto touch = std::make_shared<CrowPanelTouch>();
+
+    auto configuration = std::make_unique<St7789Display::Configuration>(
+        CROWPANEL_LCD_SPI_HOST,
+        CROWPANEL_LCD_PIN_CS,
+        CROWPANEL_LCD_PIN_DC,
+        320,
+        240,
+        touch
+    );
+
+    configuration->backlightDutyFunction = driver::pwmbacklight::setBacklightDuty;
+
+    return std::make_shared<St7789Display>(std::move(configuration));
+}