Merge pull request #3 from JulianRadix/FileManager

Update main.rb

Update main.rb

Update lib/file_manager.rb

Implement unsaved changes tracking and update title dynamically

Add file management functionality with open and save dialogs

Merge pull request #2 from JulianRadix/MarkdownParser

Fix license link formatting in README.md

Add initial README.md with project description, dependencies, and license information

Implement Markdown rendering with Rouge and enhance live update functionality

Integrate MarkdownParser for live HTML rendering in the editor

Merge pull request #1 from JulianRadix/webkit

Add WebKit2GTK integration for HTML preview and update handling

Refactor main window setup and integrate editor and preview panes

Add initial GTK3 window setup with text view and scrolling functionality