fix(marketplace): correct stale hook references and migration guide errors

- claude-config-audit-settings.md: update hook inventory to post-Decision #29 state
- maintainer.md: remove PostToolUse references, update to current hook types
- settings-optimization.md: update review layer table and hooks.json format
- claude-config-optimize-settings.md: fix stale doc-guardian PostToolUse reference
- project-hygiene/claude-md-integration.md: rewrite for manual /hygiene check
- doc-guardian: update doc-sync.md and sync-workflow.md hook references
- MIGRATION-v9.md: mark deleted commands as Removed, not renamed
- projman/task-sizing.md: PostToolUse → PreToolUse in example
- scripts/setup.sh: /labels-sync → /labels sync
- docs/CONFIGURATION.md: doc-guardian "Commands and hooks" → "Commands only"
- docs/prompts/INDEX.md: add prompt execution index

Version: 9.0.1

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

plugins/claude-config-maintainer/skills/settings-optimization.md

@@ -351,14 +351,19 @@ To verify which review layers are active, read these files:
 
 ```json
 {
-  "hooks": [
-    {
-      "event": "PreToolUse",
-      "type": "command",
-      "command": "./hooks/security-check.sh",
-      "tools": ["Write", "Edit", "MultiEdit"]
-    }
-  ]
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Write|Edit|MultiEdit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "./hooks/security-check.sh"
+          }
+        ]
+      }
+    ]
+  }
 }
 ```