why: release responsive Mermaid diagrams and the sphinx-gp-highlighting
package (tree lexer, command/path inline roles, opt-in automatic
highlighting).

what:
- Bump all workspace packages 0.0.1a32 → 0.0.1a33
- Date CHANGES entry for 0.0.1a33 (2026-07-05)
- Add 0.0.1a34 unreleased header