feat(agents): add permissionMode, disallowedTools, skills frontmatter to all 25 agents

- permissionMode: 1 bypassPermissions, 7 acceptEdits, 7 default, 10 plan
- disallowedTools: 12 agents blocked from Write/Edit/MultiEdit
- model: promote Planner + Code Reviewer to opus
- skills: auto-inject on Executor (7), Code Reviewer (4), Maintainer (2)
- docs: CLAUDE.md + CONFIGURATION.md updated with full agent matrix

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

plugins/viz-platform/agents/layout-builder.md

@@ -2,6 +2,7 @@
 name: layout-builder
 description: Practical dashboard layout specialist for creating well-structured layouts with filtering, grid systems, and responsive design.
 model: sonnet
+permissionMode: default
 ---
 
 # Layout Builder Agent