VSCode extension: make debugging of quarto documents easier

I have recently switched to VSCode and I must say I like it, but there are some small things which are not as user friendly as in RStudio when working with Quarto documents (which I am doing a lot!).

These are in no particular order:

• when executing a code block, it is in case of pa parametrised quarto document necessary to load the parameter. I can do this by using params <- rmarkdown::yaml_front_matter('$TM_FILEPATH') in a snippet to insert this wherever I need it (mainly in the setup code cell. It would be nice to have this done automatically when running a code cell or by a keyboard shortcut.

• Before running an arbitrary code cell, I often have to run the setup cell to load packages, setup folders, etc. So I move up in the document, execute the setup cell, and move back again to where I was working. In my case I had to do this regularly, as my R session crashed... It would be great, to have a shortcut to execute the setup cell (or any other one actually) or, done automatically if a code cell is run which is not the setup cell.

No files, tests, or entry points are named in the issue. Start by locating the VSCode extension's code-cell execution path and its handling of Quarto setup cells and parameters. Done means providing a clear way to load parameters and run the setup cell before an arbitrary cell, with behavior verified for the described workflow.