Implement 'go to top/bottom' in TUI

Now there are 2 new keybindings in TUI:
- 'g' Go to the top of the note list
- 'G' Go to the bottom of the note list

src/brn_tui/main.rs

@@ -65,6 +65,10 @@ impl BrnTui {
                             => BrnTui::increment_selected_value(tui_data, settings),
                         KeyCode::Char('k') | KeyCode::Up
                             => BrnTui::decrement_selected_value(tui_data, settings),
+                        KeyCode::Char('g')
+                            => BrnTui::select_first_value(tui_data, settings),
+                        KeyCode::Char('G')
+                            => BrnTui::select_last_value(tui_data, settings),
                         KeyCode::Char('l') | KeyCode::Right | KeyCode::Enter
                             => BrnTui::open_selected_note(terminal, tui_data, settings),
                         KeyCode::Char('y')
@@ -268,6 +272,17 @@ impl BrnTui {
         BrnTui::show_note_content_preview(tui_data, settings);
     }
 
+    fn select_first_value(tui_data: &mut TuiData, settings: &mut Settings) {
+        tui_data.note_list.select(Some(0));
+        BrnTui::show_note_content_preview(tui_data, settings);
+    }
+
+    fn select_last_value(tui_data: &mut TuiData, settings: &mut Settings) {
+        let last_index = tui_data.note_list.get_items().len() - 1;
+        tui_data.note_list.select(Some(last_index));
+        BrnTui::show_note_content_preview(tui_data, settings);
+    }
+
     fn show_note_content_preview(tui_data: &mut TuiData, settings: &mut Settings) {
         if let Some(selected_note_name) = &tui_data.note_list.selected_item() {
             if let Some(note_id) = Database::get_note_id_where(NoteProperty::NoteName, selected_note_name) {