docs: add documentation and sync script

- CLAUDE.md: guidance for Claude Code AI
- README.md: repository overview and structure
- QUICKSTART.md: setup and usage guide
- SUMMARY.md: inventory of workflows and snippets
- alfred-sync.sh: git sync script for Alfred preferences

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

SUMMARY.md

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+# Repository Summary
+
+Alfred Preferences Sync - A git-based synchronization setup for Alfred workflows, snippets, and preferences across multiple Mac machines.
+
+## Contents
+
+### Workflows (6 total)
+
+| ID | Name | Bundle ID |
+|----|------|-----------|
+| 35C994AB... | 無腦生密碼 | DELL |
+| 60982561... | 使用Prettier自動格式化程式碼 | - |
+| 88DDE590... | Office 滅證 | com.timmy.officecleaner |
+| CB674C87... | 使用urldecode解碼URL編碼字串 | - |
+| D7139EE1... | 盤古之白自動加空格 | - |
+| F776EB14... | TextTaiwanizer | - |
+
+### Snippet Collections (30+ categories)
+
+**Chinese/Text Collections:**
+- 中文輸出速查 - Chinese vocabulary and phrases
+- 術語速查字典 - Technical terminology (SQL, Oracle, Marketing, etc.)
+- 特殊字元輸出集 - Special characters
+- 日本語 - Japanese snippets
+
+**Tool-Specific Collections:**
+- Docker
+- Homebrew 工具箱
+- Podman
+- Lima
+- Visual Studio Code
+- gcloud
+- pyenv
+- pipenv
+- Supervisor 管理工具
+- OpenWrt UCI 工具箱
+- Sudo 管理小幫手
+- Tone & Prompt 工具箱
+
+**Other Collections:**
+- 常用密碼快速鍵
+- Note
+- alias
+- cmd
+- 寶可夢
+- 標籤
+- topsecret (credentials)
+
+### Preferences
+
+- `prefs.plist` - Main Alfred preferences (location: Taiwan)
+- Features and workflow configurations
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `alfred-sync.sh` | Git sync script (add, commit, push) |
+| `Alfred.alfredpreferences/` | Alfred preferences package |
+| `CLAUDE.md` | Guidance for Claude Code AI |
+| `README.md` | Repository overview |
+| `QUICKSTART.md` | Quick start guide |
+| `SUMMARY.md` | This file |
+
+## Quick Commands
+
+```bash
+# Sync changes
+./alfred-sync.sh
+
+# Pull latest changes
+git pull
+
+# Check workflow names
+for dir in Alfred.alfredpreferences/workflows/*/; do
+    plutil -p "$dir/info.plist" | grep "name"
+done
+```
+
+## Technical Details
+
+- **Format**: XML plist for workflows, JSON for snippets
+- **Sync Method**: Git with manual sync script
+- **Alfred Version**: Compatible with Alfred 4+
+- **macOS Location**: `~/Library/Application Support/Alfred/`