Feature enhancements

The application has been upgraded and now runs on .NET 8. With this comes improved performance.

New features have been added:

• Optimized UX for Windows 11: The application has been optimized to ensure a smooth user experience on Windows 11.
  
• Adjacent tile highlighting: Adjacent tiles, that are possibly a bomb, are highlighted on middle mouse button click on a tile.
• Adjacent tile uncovering: Adjacent tiles, that can't be bombs (based on marked states), are recursively uncovered on middle mouse button click on a number tile.

Bugs have been fixed:

• Right click tile marking delay: Fixed the bug causing a delay when marking a tile with a right click quickly.