Fix no file in directory bug

[NguyenNguyen205]

*Fixes Issue #28 *

Changed Files:
App.svelte

What has changed:

• Add new h2 tag element to display message if no files were found
• Update the update method to check if there are any files in the directory

[github-actions]

Thank you for opening your first pull request! Wait until we get to it and see if you can merge.

[Villy-P]

Thanks for the PR! We need to fix one more thing, and then we can merge. This project uses Svelte for reactivity, but you're using normal JS for changing the state of the elements. We can do this much easier with Svelte!

If you create a global variable and set it equal to extensionsSort.size > 0, you can use a cool Svelte trick to show and hide the data:

{#if !areFiles} <-- Place your variable here
	<h2>No files were found in the directory {cwd}</h2> 
{:else}
	<!-- Place all other elements here: we only want to have the h2 in our display if there are no other files -->
{/if}

Svelte will automatically update the DOM to reflect the changes.
If you have any questions, please feel free to ask!