Prerendering and previews for Shaders

[cmgriffing]

I just created a script to render and preview shaders into gifs. Its not perfect, but you can see the result here: https://github.com/cmgriffing/ghostty-shaders?tab=readme-ov-file

Look at the generate-previews.sh file.

I would be happy to work with you to make it appropriate since I have shaders that are not here in this repo.

Also feel free to ask me to make individual PRs for shaders that aren't here yet like night-drive.

[cmgriffing]

If you want to copy and paste and then modify any of the code from my repo, please do so.

[hackr-sh]

Hey! This all looks super cool! Feel free to make a PR (or PRs) for any shaders you want to share! (I won't copy paste the code since you worked on it and deserve credit)

Edit: And the previews for the shaders too!