Add docx output format for pkgdown articles

[Copilot]

Description

Enables Word document generation for all pkgdown articles by adding docx format to the global Quarto configuration.

Changes

• _quarto.yml: Added docx format with numbered sections, TOC, and document-level references
• vignettes/articles/.gitignore: Exclude generated *.docx files
• inst/WORDLIST: Added docx and yml terms
• NEWS.md: Documented the change
• DESCRIPTION: Incremented version to 1.4.0.9004

Articles now render to four formats: HTML, reveal.js, PowerPoint, and Word.

---

• The title of your PR should briefly describe the change.
• Commit/merge messages to be included in NEWS.md should begin with -.
• Code should follow the tidyverse style guide.
• Documentation should use roxygen2, with Markdown syntax.
• Contributions should include unit tests (using testthat). (N/A - configuration change only)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• cdn.jsdelivr.net
  • Triggering command: /opt/R/4.5.2/lib/R/bin/exec/R /opt/R/4.5.2/lib/R/bin/exec/R --slave --no-save --no-restore -f /tmp/RtmpeYaQYK/callr-scr-28084c23a201 (dns block)
• https://api.github.com/repos/UCD-SERG/rpt/branches
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/UCD-SERG/rpt/commits
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/UCD-SERG/rpt/contents/vignettes
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/UCD-SERG/rpt/git/trees/main
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/repos/UCD-SERG/rpt/issues
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)
• https://api.github.com/search/code
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>add docx output for pkgdown articles</issue_title>
<issue_description>follow example of https://github.com/UCD-SERG/rpt/</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes add docx output for pkgdown articles #496

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