Feature: Markdown WYSIWYG Editor

[thirdygayares]

Description: Develop a WYSIWYG (What You See Is What You Get) editor for users who prefer a more visual approach to editing. The editor should provide formatting options similar to markdown but visually show the result while editing.

Acceptance Criteria:
Rich text editing with a visual representation of markdown elements.
Toggle between WYSIWYG mode and raw markdown mode.
Basic formatting options available via toolbar.