a few more variants for elements

[KraXen72]

currently, there are just a few use cases where there isn't the right component to use, and adding these few would help:

• a standard size, 36*36px icon button (normal (now), filled, outlined variants also)
• an icon button that is just 1 singular icon (not trailing or leading icon), with icon size 24px
• small and big determinate circular progress bars with a number value in them (useful for percentage)
• this is maybe probably doable now but idk how, but some kind of progress inside of a button:
• better, fully rounded close buttons for chips: (screenshot from vuetify), chips with value instead of icon, icon on runded bg:
• skeleton loaders:
• password textfields with built in reveal button
• textfield with multiple select/ select with multiple / combobox (idk how is it called)
• an autocomplete element - i saw the pull request and it's cool to put it in smui-extra, but please do:

there are probably some more (in vuetify for example) that would be also cool here, but these are the ones that i really felt like were missing

[tomap]

I would be very appreciative of a more complex select/multiselect or something similar to "textfield with multiple select/ select with multiple / combobox (idk how is it called)"