🎥 Add Videos to Preview Pages

[mlamina]

This pull request enhances the user experience by adding video demonstrations to various preview pages and optimizing the navigation for mobile devices. The changes improve the visual appeal and functionality of the application, making it more user-friendly and engaging.

Enhancements to Preview Pages

• Updated build_preview.html to include a video demonstration of the Build tool.
• Modified chat_preview.html to adjust button styles for better mobile compatibility.
• Enhanced pr_manager_preview.html with a video showcasing the PR Manager tool.
• Updated tasks_preview.html to include a video demonstration of the Tasks tool.

Mobile Navigation Optimization

• Improved the navigation bar in base.html for better mobile responsiveness.
• Added a hamburger menu for easier access on smaller screens.

Version Update

• Bumped the application version in pyproject.toml from 0.6.3 to 0.6.4.

These updates aim to provide a more intuitive and visually appealing interface, enhancing the overall user experience. 🚀