Re-use output parameters of R Markdown headers as part of CMD_Render

[nuest]

We should re-use the existing output parameters for the html_document output type, see https://github.com/o2r-project/containerit/blob/51d7b2679623492dc4e09a4baeb31affdf96b686/R/Class-Cmd.R#L163

If an R Markdown document configures the output as follows, the toc configuration is lost in the documented rendered by the container:

output:
  html_document:
    df_print: paged
    toc: yes