Macro render_options 

macro_rules! render_options {
    ( $( $field:ident : $value:expr ),* $(,)? ) => { ... };
}

Construct crate::RenderOptions from defaults and a list of field assignments.

This macro exists to keep call sites ergonomic while allowing RenderOptions to evolve over time (e.g., adding fields) without forcing downstream crates to use struct literal syntax.

Defaults:

• formatter: the built-in developer formatter (DefaultMessageFormatter)
• snippets: crate::SnippetMode::Auto

Example:

use serde_saphyr::{SnippetMode, UserMessageFormatter};

let user = UserMessageFormatter;
let opts = serde_saphyr::render_options! {
    formatter: &user,
};