Merge develop into main (#303)

- `DisplayDevice` improvements related `DisplayDriver`
- Replaced incorrect usage of `spiBusHandle` with `spiHostDevice` in all SPI display devices
- Disabled `DisplayDriver` support for RGB displays for now
- Updated `GraphicsDemo` project for the above changes
- TactilityC improvements:
  - created `tt_hal_device_find()`
  - created `tt_hal_display_*`
  - created `tt_hal_touch_*`
  - created `tt_lvgl_*`
  - export `tt_app_*` calls

ExternalApps/GraphicsDemo/main/Include/drivers/DisplayDriver.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <cassert>
+#include <tt_hal_display.h>
+
+/**
+ * Wrapper for tt_hal_display_driver_*
+ */
+class DisplayDriver {
+
+    DisplayDriverHandle handle = nullptr;
+
+public:
+
+    explicit DisplayDriver(DeviceId id) {
+        assert(tt_hal_display_driver_supported(id));
+        handle = tt_hal_display_driver_alloc(id);
+        assert(handle != nullptr);
+    }
+
+    ~DisplayDriver() {
+        tt_hal_display_driver_free(handle);
+    }
+
+    bool lock(TickType timeout = MAX_TICKS) const {
+        return tt_hal_display_driver_lock(handle, timeout);
+    }
+
+    void unlock() const {
+        tt_hal_display_driver_unlock(handle);
+    }
+
+    uint16_t getWidth() const {
+        return tt_hal_display_driver_get_pixel_width(handle);
+    }
+
+    uint16_t getHeight() const {
+        return tt_hal_display_driver_get_pixel_height(handle);
+    }
+
+    ColorFormat getColorFormat() const {
+        return tt_hal_display_driver_get_colorformat(handle);
+    }
+
+    void drawBitmap(int xStart, int yStart, int xEnd, int yEnd, const void* pixelData) const {
+        tt_hal_display_driver_draw_bitmap(handle, xStart, yStart, xEnd, yEnd, pixelData);
+    }
+};