Trackball rewrite (#600)

- Implement generic trackball settings
- Refactor T-Deck trackball driver into generic driver at `Drivers/gpio-trackball-module`
- Automatically bind/unbind trackball devices with LVGL
- Automatically load settings for trackball devices on boot

Tactility/Private/Tactility/lvgl/TrackballInit.h

@@ -0,0 +1,10 @@
+#pragma once
+
+namespace tt::lvgl {
+
+/**
+ * Applies trackball settings (either stored or default ones) to all trackball devices.
+ */
+void initTrackball();
+
+}