feat(claude-config-maintainer): add settings.local.json audit feature v1.2.0

Add 3 new commands for auditing and optimizing Claude Code permission
configurations, leveraging the marketplace's multi-layer review architecture.

New commands:
- /config-audit-settings - 100-point scoring across redundancy, coverage,
  safety alignment, and profile fit
- /config-optimize-settings - apply optimizations with dry-run, named
  profiles (conservative, reviewed, autonomous), consolidation modes
- /config-permissions-map - Mermaid diagram of review layer coverage

New skill:
- settings-optimization.md - 7 sections covering file formats, syntax
  reference, consolidation rules, review-layer-aware recommendations,
  named profiles, scoring criteria, and hook detection

Updated agent maintainer.md with new "Audit Settings Files" responsibility.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/claude-config-maintainer/skills/visual-header.md

@@ -47,6 +47,27 @@ This skill defines the standard visual header for claude-config-maintainer comma
 +-----------------------------------------------------------------+
 ```
 
+### /config-audit-settings
+```
++-----------------------------------------------------------------+
+|  CONFIG-MAINTAINER - Settings Audit                              |
++-----------------------------------------------------------------+
+```
+
+### /config-optimize-settings
+```
++-----------------------------------------------------------------+
+|  CONFIG-MAINTAINER - Settings Optimization                       |
++-----------------------------------------------------------------+
+```
+
+### /config-permissions-map
+```
++-----------------------------------------------------------------+
+|  CONFIG-MAINTAINER - Permissions Map                             |
++-----------------------------------------------------------------+
+```
+
 ## Usage
 
 Display the header at the start of command execution, before any analysis or output.