Allow knit Rmd to integrate with RMarkdown's site paradigm #615
Description
Is your feature request related to a problem? Please describe.
If I am working in an RMarkdown, blogdown, or distill site in RStudio, I am able to use the Knit button/ ctrl+shift+k to render an individual page in the context of the site. If I'm working in VScode, this renders a page that is outside of the context of the full site (no headers, footers, or styling).
Describe the solution you'd like
Have ctrl+shift+k mimic the process of RStudio to detect if there is a file called index.R?md and see if it has a site: yaml item with a generator (documentation: https://bookdown.org/yihui/rmarkdown/rmarkdown-site.html). If this condition is true, then it would run rmarkdown::render_site("<FILE>")
Describe alternatives you've considered
My current alternative is using RStudio