Function any_sibling 

pub fn any_sibling(
    pseudo: &str,
    options: Option<&StyleXStateOptions>,
) -> Result<String, String>

Creates selector that observes if the given pseudo-class is active on any sibling with the “defaultMarker”

Arguments

• pseudo - The pseudo selector (e.g., ‘:hover’, ‘:focus’)
• options - Either a custom marker string or StyleXStateOptions reference

Returns

A :where() clause for the any sibling observer