Support for styles to be overridden

[equidevium]

Most likely I will add support for styles to be overridden since it makes sense.

The idea is to use a pattern where each component accepts optional style override props that get merged with the defaults.

// Each component could accept an optional class override
#[props(into, default)]
class_override: Option<String>,

// Then in the component:
class: format!("{} {}", s::DEFAULT_STYLE, class_override.unwrap_or_default()),

This way the base Tailwind classes from _styles.rs always apply, and the consumer can append or override with additional classes. It is a lightweight "inheritance" without needing a whole style system, though it is worth thinking through which components benefit from this and which should stay opinionated.