Implement File Tree Navigation

[chrisdedman]

Description:

Implement a file tree navigation feature within the code editor using Qt6's QTreeView and model-view architecture to enable users to browse the project's directory structure. This feature should display directories and files in a hierarchical structure, providing an intuitive and user-friendly way to explore the project.

Tasks:

• Design the UI layout for file tree navigation using Qt6.
• Implement model-view architecture with QTreeView to display directory structure.
• Implement expandable/collapsible folders.
• Add file and folder selection functionality.
• Add an option(button) to collapse the tree navigation.
• Test and refine the file tree navigation.