Support `:state(<custom-ident>)` and other pseudo-classes

Please officially support the pseudo-class `:state(<custom-ident>)`! It is marked as Baseline 2024 and is supported by all major browsers. See https://developer.mozilla.org/en-US/docs/Web/CSS/:state

Currently, lightningcss spits out the following warning:

_'state' is not recognized as a valid pseudo-class. Did you mean '::state' (pseudo-element) or is this a typo?_