refactor: ♻️ delete whole references folder pre and post render (#142)

# Description

This PR makes the pre and post render steps delete the whole
`references` folder, not just the `qmd` files.

This PR needs a quick review.

## Checklist

- [x] Added or updated tests
- [x] Updated documentation
- [x] Ran `just run-all`

---------

Co-authored-by: Luke W. Johnston <lwjohnst86@users.noreply.github.com>

Author: martonvago

template/_quarto.yml.jinja

@@ -1,8 +1,6 @@
 project:
   # TODO: change to extension name if using a custom extension
   type: website
-  # Delete auto-generated files from `quartodoc`
-  post-render: rm -f docs/reference/*.qmd
   render:
     - "docs/*"
     - "index.qmd"

template/justfile.jinja

@@ -61,7 +61,7 @@ build-website:
   export QUARTO_PYTHON=.venv/bin/python3
   # Delete any previously built files from quartodoc.
   # -f is to not give an error if the files don't exist yet.
-  rm -f docs/reference/*.qmd
+  rm -rf docs/reference
   uv run quartodoc build
   uv run quarto render --execute