Add Breadcrumb, ContextMenu, Dialog, and Toast elements with event handling and rendering capabilities

- Implemented Breadcrumb element for navigation with selectable segments.
- Created ContextMenu element for displaying clickable items and submenus.
- Developed Dialog element for alert, confirm, and prompt dialogs with modal support.
- Introduced Toast element for temporary message notifications with auto-hide functionality.

Author: NoryiE

.gitignore

@@ -11,11 +11,6 @@ Flexbox2.lua
 markdown.lua
 markdown2.lua
 SplitPane.lua
-Accordion.lua
 Stepper.lua
 Drawer.lua
-Breadcrumb.lua
-Dialog.lua
-DockLayout.lua
-ContextMenu.lua
-Toast.lua
+DockLayout.lua