Add a `quote.block` alias for `quote.with(block: true)`

Description

Pretty self-explanatory: add a blockquote (edit: quote.block) element equivalent to quote.with(block: true) or simply an alias blockquote == quote.with(block: true) (edit: quote.block == quote.with(block: true).

Related: https://github.com/typst/typst/issues/2362

Use Case

I'm using Typst to take notes about third-party sources so I'm heavily quoting content and wish I could simply type #blockquote[...] (edit: #quote.block[...]) instead of #quote(block: true)[...] or having to define #let blockquote = quote.with(block: true) somewhere (either in the files themselves (boilerplate) or in a module (dependency)).

The issue mentioned above also describes a use case related to "humanities / literary studies / social sciences", domains that we "also want to cater to".