SQL engine improvement

[cderv]

This is to track the different topic related to an improvement of the current SQL engine support in knitr.

It could be a fixup in current eng_sql or a new package project dedicated to SQL chunks. (I think we discussed it with @edgaruiz in the past)

KNITR

• https://github.com/yihui/knitr/issues/2093
• https://github.com/yihui/knitr/issues/2050
• https://github.com/yihui/knitr/issues/1778

R Markdown

• https://github.com/rstudio/rmarkdown/issues/2241
• https://github.com/rstudio/rmarkdown/issues/2342

Quarto

• https://github.com/quarto-dev/quarto-cli/issues/4869 (https://github.com/quarto-dev/quarto-cli/pull/7829)