Unified Classical Scriptorium Theme & Collection Redesign

Unified the visual design, navigation architecture, and collection/log templates of photon-platform.publish around the Classical Scriptorium Book Codex aesthetic across all PHOTON and GEOMETOR sites.

Highlights

• Unified Classical Scriptorium Palette & Typography: Standardized all pages, sidebars, headers, footers, blockquotes, and cards around --book-* design tokens, EB Garamond display/body typography, and Fira Sans Condensed metadata badges in both Nocturnal Parchment (dark) and Warm Ivory (light) modes.

• Subtree-Aware Navigation Active States: Updated layout/header/nav.html and layout/footer/nav.html so section links remain highlighted when browsing any nested document inside a Book Codex or documentation subtree, with exact matching for master_doc.

• Natural Roman & Numeric Taxonomy Sorting: Added _natural_taxonomy_sort_key and _sort_taxonomy_articles in directives/collection.py so book-i..``book-xiii`` and numbered propositions sort in natural ascending order.

• Redesigned Collections & Progress Logs: Restyled .collection (cards, banners, list), article.excerpt, and .meta badges, added type-safe sorting for mixed date/numeric keys, and enabled automatic :type: log and :date: inference for entries under docsrc/log/.