Coming from LaTeX, when I had some TikZ pictures I wanted to add in my
document I would usually keep them on a separate file, I would compile them
with the standalone class so that the resulting PDF's size would be limited
to exactly the dimensions of the figure. I would then import the compiled
PDF in my main document. All this to not slow down compilation times.
What's the ConTeXt equivalent of this workflow? How can I keep the PDF
dimensions limited to the figure?