Add shared bible submodule, rename local bible to bible-local

- Add bible.git as submodule at bible/
- Rename bible/ → bible-local/ (project-specific architecture)
- Update CLAUDE.md to reference both bible/ and bible-local/
- Add AGENTS.md for Codex with same structure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bible-local/decisions/README.md

@@ -0,0 +1,17 @@
+# Architecture Decision Records
+
+Use this directory to capture architecture decisions and significant updates.
+
+## Required
+
+- Every architecture decision must be recorded in the Bible.
+- If a decision replaces an older one, update the older document in the same change.
+- Keep entries short, explicit, and linked to the affected architecture files.
+
+## Minimal Entry Template
+
+- Date (`YYYY-MM-DD`)
+- Decision
+- Context
+- Consequences
+- Supersedes (if any)