Enhancement: Make only long hold notes have transparency

[Lasercar]

Issue Checklist

• I have read the pinned Issues Guide
• I have checked the Issues/Discussions pages to see if my enhancement has already been suggested
• I have properly named my enhancement

What is your suggestion, and why should it be implemented?

When I was getting some clips for this PR FunkinCrew/funkin.assets#111 a few days ago, I thought that transparent hold notes looked way cooler than opaque ones.

If the issue is that short hold notes are harder to see with the transparency, then maybe only make short holds opaque, but make everything else have the transparency? Something like this:

The only problem really with doing it like this is that it doesn't really account for scroll speeds (and it might effect song loading performance? idk), but I'm sure something can be figured out for that too