Add keyboard shortcuts support on the front-end for File Manager

[kannifarhad]

Implement common keyboard shortcuts to improve usability and efficiency when managing files and folders.

Keyboard Shortcuts Overview:
• Ctrl + Click → Select multiple items
• Ctrl + C → Copy the currently hovered item or all selected items to the clipboard
• Ctrl + X → Cut the currently hovered item or all selected items to the clipboard
• Ctrl + V → Paste items from the clipboard into the current directory (if copied or cut items exist)
• Ctrl + Delete or Ctrl + Backspace → Delete the currently hovered or selected items