qpost() opens an interactive dialog for entering a post's title and
other metadata, then scaffolds the corresponding blog post file.
Value
Nothing. What matters are the side effects:
create a folder named with the date followed by the kebab-case post title
create an
index.qmdfilecopy the (optional) image file into the folder
populate the YAML front matter
open the new file in RStudio or Positron for editing
