chore: optimize icons and update previews

[uncenter]

Looks like the last few PRs didn't have their SVGs optimized.

[prazdevs]

you may want to regenerate css-var versions as well, they don't get run through the optimize script as they should be created afterwards. the script is kinda wonky still for some reason i cant run all scripts sequentially, maybe i'll add an ugly wait between optimize and generate

[uncenter]

Sounds good. Regenerated them and for some reason the macchiato preview image changed as well.