Better debouncing for filtered list videos

[vishalbalaji]

This PR simplifies the de-bouncing of the video search filter on the list page.

What type of Pull Request is this?

• Refactoring (no functional changes, no API changes)

What is the current behavior?

• Currently, the videos that come in through a streamed promise from the server are awaited twice, once in the script tag and once in the actual template in the #await block.
• On top of that, de-bouncing of the search filter and filtering of the array were combined, which introduced some unnecessary complexity.

What is the new behavior?

• The de-bouncing of the search filter and filtering of the videos is separated into their own functions.
• Instead of filtering every time the query changes in a reactive statement, updating the search filter is handled by on:keyup.
• Instead of awaiting allVideos in the template and maintaining a separate filteredVideos array, the videos are filtered inline, directly in the #await block.
• Every time filter is updated, re-computing the videos according to the filter is handled automatically by Svelte.

Other information

This PR additionally adds a globals setting to eslintrc.cjs config for it to recognize NodeJS as a valid global type, which is where the Timeout type comes from.