Migrate TactilityC and LVGL functionality (#588)

lvgl-module

- Move and rename source and include files
- Fix bug with missing lvgl unlock
- New widgets: spinner, toolbar, sliderbox

TactilityC

- Removed tt_lock, tt_lvgl_\*

Modules/lvgl-module/include/lvgl/widgets/sliderbox.h

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <lvgl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Create a SliderBox: a slider flanked by "-" and "+" buttons with a value label.
+ * @param[in] parent the parent object
+ * @param[in] min minimum value (inclusive)
+ * @param[in] max maximum value (inclusive)
+ * @param[in] step the amount each +/- button press changes the value by
+ * @param[in] value the initial value
+ * @return the created SliderBox instance
+ */
+lv_obj_t* lvgl_sliderbox_create(lv_obj_t* parent, int32_t min, int32_t max, int32_t step, int32_t value);
+
+/** @return the current value of the SliderBox */
+int32_t lvgl_sliderbox_get_value(lv_obj_t* obj);
+
+/**
+ * Set the current value of the SliderBox (clamped to its [min, max] range).
+ * Updates the slider position and the value label.
+ */
+void lvgl_sliderbox_set_value(lv_obj_t* obj, int32_t value, lv_anim_enable_t anim);
+
+/**
+ * Register a callback that is fired with LV_EVENT_VALUE_CHANGED whenever the value
+ * changes, whether the change came from the slider or from the +/- buttons.
+ * @param[in] obj the SliderBox instance
+ * @param[in] callback the callback to invoke
+ * @param[in] userData user data that is attached to the event
+ */
+void lvgl_sliderbox_add_value_changed_cb(lv_obj_t* obj, lv_event_cb_t callback, void* userData);
+
+#ifdef __cplusplus
+}
+#endif