docvet 1.11: Fix Both Code Block Patterns in One Run

[Alberto-Codes]

The prefer-fenced-code-blocks rule now reports both >>> doctest blocks and :: rST code blocks in a single pass. Previously it would find one pattern and stop — you had to rerun to catch the other.

Also in this release:

• Concepts page — a new docs page walking through the six-layer quality model with a before/after showcase
• Glossary expansion — 16 new terms with hover tooltips across the docs site

Full changelog