altdoc 0.4.0

Breaking changes

• Simplified rendering for Quarto websites. Previously, the website was rendered
  into _quarto/_site and manually copied over to docs/. The new version removes
  this logic and instead uses the output-dir project option. To transition, change
  quarto_website.yml to:

  project:
    output-dir: ../docs/

New features

• render_docs(freeze = TRUE) now works correctly when output is "quarto_website".
  Freezing a document needs to be set either at a project or per-file level. To do
  so, add to either quarto_website.yml or the frontmatter of a file:

  execute:
    freeze: auto

• For Quarto websites, render_docs() can use the downlit package to automatically
  link function calls to their documentation on the web. Turn off by modifying
  the code-link line in altdoc/quarto_website.yml

• Citation is now formatted with HTML instead of verbatim (#282, Achim Zeileis).

• The \doi{} tags in Rd files are now linked once rendered (#282, Achim Zeileis).

• Warn if README.qmd does not exist when calling setup_docs("quarto_website"). Issue #280.

Other changes

• Update github-pages-deploy-action to v4
• Support @examplesIf tag in roxygen2