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/spinner.h

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <lvgl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Creates the Tactility spinner widget.
+ * @param[in] parent the parent object for the new spinner
+ * @return the created spinner
+ */
+lv_obj_t* lvgl_spinner_create(lv_obj_t* parent);
+
+#ifdef __cplusplus
+}
+#endif