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>

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "bible"]
+	path = bible
+	url = https://git.mchus.pro/mchus/bible.git