stack: TOC-Scope auf types/ und docs/, Sprachregeln nach AGENTS.md zentralisiert, alle Templates auf Control-Plane-Sprache, --breaking akkumuliert (schliesst #99)

Files changed:
- AGENTS.md
- CHANGES.md
- ENVIRONMENT.md.template
- SOUL.md
- SOUL.md.template
- USER.md.template
- VERSION
- docs/ownership-and-templates.md
- docs/version-model.md
- instructions/CONTRACT.md
- instructions/dev/doc-pull-through.md
- instructions/dev/stack-close/SKILL.md
- instructions/dev/stack-dev/SKILL.md
- instructions/dev/version-parts.md
- instructions/setup-instance.md
- kb/CONVENTIONS.md
- kb/CONVENTIONS.md.template
- kb/concepts/COLLECTION.md
- kb/sources/COLLECTION.md
- tools/CONTRACT.md
- tools/chemenu/commands/types_cmd.py
- tools/chemenu/commands/version_cmd.py
- tools/chemenu/tests/test_toc.py
- tools/chemenu/tests/test_version_cmd.py
- tools/chemenu/toc.py
- tools/chemenu/version.py
- types/comparison.md
- types/concept.md
- types/entity.md
- types/lint-report.md
- types/source.md

docs/ownership-and-templates.md

@@ -9,6 +9,16 @@ below). Others - `USER.md`,
 `SOUL.md`, `kb/CONVENTIONS.md`, `ENVIRONMENT.md` - describe one particular instance, and
 overwriting them would silently erase a choice someone made on purpose.
 
+<!-- wikitool:toc -->
+## Contents
+
+- [Two different kinds of truth](#two-different-kinds-of-truth)
+- [Why silent overwrite is the failure being designed against](#why-silent-overwrite-is-the-failure-being-designed-against)
+- [Why the boundary is a predicate rather than a list](#why-the-boundary-is-a-predicate-rather-than-a-list)
+- [Why a `.template`, not just an absent file](#why-a-template-not-just-an-absent-file)
+- [The consequence in practice](#the-consequence-in-practice)
+<!-- /wikitool:toc -->
+
 ## Two different kinds of truth
 
 The stack-owned files describe how the tool works. `kb/CONTRACT.md` opens by saying it holds