Add Loader to Website

[Yaser-123]

I propose adding a loader to the Visual Sort website to improve user experience during sorting operations. This enhancement will inform users that a process is ongoing, especially during longer sorting times.

Title: Loading Indicator
Description: Implement a loading spinner or progress bar that appears when the sorting process starts and disappears upon completion. This feature will enhance the user experience by providing visual feedback during operations.
Features:
Loading spinner or progress bar
Display during sorting process initialization and execution
Hide once sorting is complete