Function process_markdown_to_plain_text 

pub fn process_markdown_to_plain_text(
    content: &str,
    options: &MarkdownOptions<'_>,
) -> Result<String, MarkdownError>

Extracts plain-text content from Markdown, stripping all formatting and markup.

This is useful for building search indexes, generating plain-text excerpts, or calculating reading time.

Errors

Returns a MarkdownError if input exceeds the size limit.