feat: a subtype gets its own page skeleton from types/<type>.<value>.md (#117)

Files changed:
- AGENTS.md
- CHANGES.md
- README.md
- VERSION
- docs/ownership-and-templates.md
- instructions/evolve-subtypes.md
- instructions/setup-instance.md
- instructions/subtype-templates.md
- instructions/upgrade-instance.md
- tools/CONTRACT.md
- tools/chemenu/commands/dist_cmd.py
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/new_page.py
- tools/chemenu/tests/test_dist_cmd.py
- tools/chemenu/tests/test_docs_verify.py
- tools/chemenu/tests/test_new_page.py
- tools/chemenu/tests/test_toc.py
- tools/chemenu/tests/test_type_resolver.py
- tools/chemenu/toc.py
- tools/chemenu/type_resolver.py
- types/concept.decision.md
- types/entity.guidance.md
- types/entity.md
- types/entity.person.md
- types/type-spec.md

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

instructions/evolve-subtypes.md

@@ -102,6 +102,11 @@ choice of an instance's starting vocabulary - that is
 4. **Record it** with `tools/wikitool log append`, describing what moved and why, the same way
    any other corpus change is logged.
 
+5. **A newly added value scaffolds with the type's `## Template` block** until it has a subtype
+   template of its own. Whether its pages want a different skeleton is a separate judgment, made
+   against the pages once they exist, by the same ≥3-page rule as above:
+   [subtype-templates.md](subtype-templates.md).
+
 ## Decision points
 
 - **The catch-all is empty and lint reports nothing?** Nothing to do - an empty catch-all is the