chore: align IaC with today's package installs + PDF comparison docs

DevOps sync (2026-05-21):
- Remove onlyoffice-desktopeditors from absent list (actively used)
- Add gnome-keyring, rbw to common role (secrets migration)
- Add perl-image-exiftool, icoutils, innoextract-git to dev-tools
  (Windows installer inspection)
- Create fonts role: Inter, Cascadia Code, Fira, Source Sans, TeX Gyre
- Create pdf role: zathura, zathura-pdf-mupdf, python-weasyprint
- Register new roles in workstation.yml

PDF comparison:
- Add pdf-comparison docs with Quarto/Typst/Pandoc outputs
- Add batch-pdf.sh script
- Update yazi-cheatsheet.md
- Ignore .quarto/ cache

ansible/roles/fonts/tasks/main.yml

@@ -0,0 +1,17 @@
+---
+- name: Ensure workstation fonts are installed
+  community.general.pacman:
+    name:
+      # Primary UI font (Inter brand font)
+      - inter-font
+      # Code editor fonts
+      - otf-cascadia-code
+      - ttf-fira-code
+      - otf-fira-mono
+      # Sans-serif families
+      - otf-fira-sans
+      - adobe-source-sans-fonts
+      # Serif fallback
+      - tex-gyre-fonts
+    state: present
+  tags: [fonts, typography]