Yaru: Missing mimetype for meson icons

[madsrh]

Could any of these ideas work @Feichtmeier @clobrano @ubuntujaggers ?

[clobrano]

Number 2 for me, it seems more in line with the other mime types

[real-amano]

Maybe the icon is still a bit loud with that dark solid logo.

[madsrh]

...it seems more in line with the other mime types

Well, we do actually have a lot of icons with colored backgrounds, but I do agree that the white background fits better here.

the icon is still a bit loud with that dark solid logo.

This might be because I used the official meson color rather than a color from the suru color palette

I'll update the PR with white version here

[meetdilip]

All 4 are good. Not just good, looks brilliant.