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>

README.md

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+# Alfred Preferences Sync
+
+This repository contains synchronized Alfred preferences, including workflows, snippets, and configurations. The setup allows for easy backup and synchronization across multiple Mac machines.
+
+## Overview
+
+Alfred is a productivity application for macOS. This repository uses git to version-control and sync:
+
+- **Workflows** - Custom automation scripts and workflows
+- **Snippets** - Text expansion collections organized by theme
+- **Preferences** - Alfred application settings
+
+## Repository Structure
+
+```
+AlfredPrefs/
+├── Alfred.alfredpreferences/     # Main Alfred preferences package
+│   ├── workflows/                # Alfred workflows (UUID directories)
+│   ├── snippets/                 # Text snippet collections
+│   ├── preferences/              # General settings
+│   ├── resources/                # Icons and assets
+│   └── remote/                   # Sync metadata
+└── alfred-sync.sh                # Sync script
+```
+
+## Cloning to a New Machine
+
+1. Clone this repository:
+   ```bash
+   git clone <repository-url> ~/Sync/AlfredPrefs
+   ```
+
+2. Symlink to Alfred's expected location (if needed):
+   ```bash
+   ln -s ~/Sync/AlfredPrefs/Alfred.alfredpreferences ~/Library/Application\ Support/Alfred/Alfred.alfredpreferences
+   ```
+
+3. Restart Alfred to load the preferences
+
+## Syncing Changes
+
+After making changes to Alfred workflows or snippets:
+
+```bash
+cd ~/Sync/AlfredPrefs
+./alfred-sync.sh
+```
+
+This will:
+- Stage all changes
+- Create a timestamped commit
+- Push to the remote repository
+
+## Workflows Included
+
+| Workflow Name | Description |
+|--------------|-------------|
+| 無腦生密碼 | Password generator (easy to read/all characters) |
+| TextTaiwanizer | Convert text to Taiwan-style Chinese |
+| 盤古之白自動加空格 | Auto-add spaces between Chinese and English |
+| 使用Prettier自動格式化程式碼 | Prettier code formatter |
+| 使用urldecode解碼URL編碼字串 | URL decoder |
+| Office 滅證 | Office metadata cleaner |
+
+## Snippet Collections
+
+- **術語速查字典** - Technical terminology (SQL, Oracle, Docker, etc.)
+- **中文輸出速查** - Chinese text expansion shortcuts
+- **特殊字元輸出集** - Special character collections
+- **常用密碼快速鍵** - Password shortcuts
+- Various tool-specific collections (Homebrew, Docker, VS Code, etc.)
+
+## Caution
+
+Some snippet collections contain sensitive information (e.g., `topsecret/`). Be mindful when committing and sharing this repository.
+
+## License
+
+Personal use only.