Expand @container to be container-type: size

[mscofield0]

I don't know the reasoning behind not making it container-type: size and also not having h-sm, h-md, etc., variants for height breakpoints.

[mscofield0]

The reasoning behind having height breakpoints is that e.g. you have a menu in the header, but you want to support mobile landscape without the header taking up too much space and so you want to enable a sidebar menu instead. I am using height breakpoint extensively and already have it in my utilities, but I don't see why Tailwind wouldn't provide their own, with a probably more reasonable values for the breakpoints.

[wongjn]

Relevant: #18901