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

types/entity.guidance.md

@@ -6,12 +6,12 @@ description: When to write an entity page instead of a neighboring type, and how
 
 # Entity Guidance
 
-`entity` is the type for concrete things: projects, systems, tools, technologies or people.
+`entity` is the type for concrete things: codebases, systems, tools, technologies or people.
 Entities are the primary building blocks of the knowledge graph.
 
 ## When to use
 
-- Representing a software project or codebase
+- Representing a codebase - a repository, library or application as code
 - Documenting a running system, service or infrastructure component
 - Describing a CLI tool, utility or software library
 - Recording information about a language, a framework or a protocol