Struct and schema for the render entity in the typst DSL section.
A render entity declares an action that compiles a template and exports it in
the specified format (:pdf, :svg, :html, or :bundle). It can include
arguments, a read sub-entity to fetch resource data, pdf_options for
PDF-specific settings, and preparations/validations.
For the full DSL reference, see AshTypst.Resource.typst.render.