Helper to encode data for Quarto processing inside HTML table

[cderv]

See explanation at

• Mathjax is not working properly with kableExtra html format in Quarto haozhu233/kableExtra#746 (comment)

related to

• Math formatting does not work in styled KableExtra tables quarto-cli#555

Docs for Quarto feature is at: https://quarto.org/docs/authoring/tables.html#html-tables

Example:

as_quarto_markdown <- function(content) {
  sprintf('<span data-qmd="%s">%s</span>', content, content)
}

this could be used in table to make HTML with special attributes for Quarto to process and replace

• Should handle span and div. as_quarto_markdown(..., block = TRUE) ?
• Should handle complex content by base64 encoding (using xfun::base64_encode() and data-qmd-base64
• Should probably have a markdown with special class to mark as it as content to not escape (using I() like for new R quarto inline ?)