Document agent instructions and link Bible.md in README.

Adds AGENTS.md and Documentation/Bible.md for AI assistants, and lists Bible in the project documentation index.

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -6,6 +6,7 @@ Interactive virtual art gallery: zoomable historical timeline (classic left→ri
 
 | Document | Purpose |
 |----------|---------|
+| [Documentation/Bible.md](Documentation/Bible.md) | Agent instructions (primary source for AI assistants) |
 | [Documentation/basics.md](Documentation/basics.md) | Architecture, layout, user flow |
 | [Documentation/ui-interaction-and-component-standards.md](Documentation/ui-interaction-and-component-standards.md) | UI interaction, navigation, and component standards |
 | [Documentation/movement-tree.md](Documentation/movement-tree.md) | **Tree of Art** start page — tree layout rules |