feat: Add installation tool, Claude.ai export, and skill standardization (#1)

## Summary

- Add portable installation tool (`install.sh`) for cross-machine setup
- Add Claude.ai export files with proper YAML frontmatter
- Add multi-agent-guide v2.0 with consolidated framework template
- Rename `00-claude-code-setting` → `00-our-settings-audit` (avoid reserved word)
- Add YAML frontmatter to 25+ SKILL.md files for Claude Desktop compatibility

## Commits Included

- `93f604a` feat: Add portable installation tool for cross-machine setup
- `9b84104` feat: Add Claude.ai export for portable skill installation
- `f7ab973` fix: Add YAML frontmatter to Claude.ai export files
- `3fed49a` feat(multi-agent-guide): Add v2.0 with consolidated framework
- `3be26ef` refactor: Rename settings-audit skill and add YAML frontmatter

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

custom-skills/91-multi-agent-guide/README.md

@@ -1,7 +1,13 @@
-# Multi-Agent Guide Plugin
+# Multi-Agent Guide Plugin v2.0
 
 A Claude Code plugin for setting up multi-agent collaboration frameworks in complex software projects.
 
+## What's New in v2.0
+
+- **Consolidated Framework**: Single `MULTI_AGENT_FRAMEWORK.md` (~250 lines vs ~2,400)
+- **Quick Setup**: `/multi-agent-setup` command for rapid deployment
+- **Production-Tested**: Based on dintel-data-agent and our-seo-agent
+
 ## Overview
 
 This plugin helps you establish a structured collaboration framework for projects where multiple AI agents (Claude Code, Gemini, Codex, and Human) work together. It provides:
@@ -46,15 +52,19 @@ The skill activates automatically when you mention:
 - "multi-agent guide"
 - "agent coordination"
 
-### Explicit Command
+### Explicit Commands
 
-Use the slash command:
+**Quick Setup (Recommended):**
+```
+/multi-agent-setup
+```
+Rapid deployment with minimal questions. Creates consolidated framework.
 
+**Full Setup:**
 ```
 /setup-agents
 ```
-
-This will guide you through the complete setup process interactively.
+Interactive setup with full customization options.
 
 ## What Gets Created