Update material icons

[glorenzen]

This pull request adds font files for Material Symbols to replace the Material Icons fonts, which are deprecated.

The Material Icons files and classes are still there, but I have added new Material Symbols font files and replaced all material-icons CSS classes with new material-symbols classes.

[advplyr]

Thanks this is a nice update. The YearInReview components also use material icons in canvas. It should be able to get updated the same way

[glorenzen]

Awesome, I just updated the YearInReview components and a couple of others that I missed. That should be all of them now.

[glorenzen]

I know this hasn't been open for very long, but would it be possible to have this reviewed/merged soon? I'd like to use a few of the Material Symbols in my other PR #3113 :)

[mfcar]

I think it would be nice to add the link for the icon set in the README or the contributing pages.
For the old icon set, I always forgot the set name and struggled to find the link for the gallery.

[glorenzen]

@mfcar Do you mean add this link to the Contributing section at the end of the README? https://fonts.google.com/icons

[advplyr]

Great, thanks!