Refactor RootLayout and UIHandler for improved structure and functionality

- Updated RootLayout to manage layout initialization and deinitialization more effectively.
- Removed unnecessary dependencies and streamlined event handling for keyboard events.
- Enhanced UIHandler to utilize shared pointers for app descriptors, improving memory management.
- Added methods for showing and hiding navigation elements in RootLayout.
- Introduced textarea widget with instant response by disabling animations.
- Improved error handling and logging throughout the UI components.

main/ui/widgets/textarea.cpp

@@ -0,0 +1,10 @@
+#include "ui/widgets/textarea.h"
+
+lv_obj_t* textarea_create(lv_obj_t* parent) {
+  lv_obj_t* textarea = lv_textarea_create(parent);
+  // disable animations for cursor and selection for instant response
+  lv_obj_set_style_anim_time(textarea, 0, LV_PART_CURSOR | LV_STATE_FOCUSED);
+
+  return textarea;
+}
+

main/ui/widgets/textarea.h

@@ -0,0 +1,4 @@
+#pragma once
+#include "lvgl.h"
+
+lv_obj_t* textarea_create(lv_obj_t* parent);