Refactor SEO automation into unified CLI application

Major refactoring to create a clean, integrated CLI application:

### New Features:
- Unified CLI executable (./seo) with simple command structure
- All commands accept optional CSV file arguments
- Auto-detection of latest files when no arguments provided
- Simplified output directory structure (output/ instead of output/reports/)
- Cleaner export filename format (all_posts_YYYY-MM-DD.csv)

### Commands:
- export: Export all posts from WordPress sites
- analyze [csv]: Analyze posts with AI (optional CSV input)
- recategorize [csv]: Recategorize posts with AI
- seo_check: Check SEO quality
- categories: Manage categories across sites
- approve [files]: Review and approve recommendations
- full_pipeline: Run complete workflow
- analytics, gaps, opportunities, report, status

### Changes:
- Moved all scripts to scripts/ directory
- Created config.yaml for configuration
- Updated all scripts to use output/ directory
- Deprecated old seo-cli.py in favor of new ./seo
- Added AGENTS.md and CHANGELOG.md documentation
- Consolidated README.md with updated usage

### Technical:
- Added PyYAML dependency
- Removed hardcoded configuration values
- All scripts now properly integrated
- Better error handling and user feedback

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

.env.example

@@ -1,8 +1,27 @@
-# WordPress Configuration
+# WordPress Configuration (Primary Site)
 WORDPRESS_URL=https://yoursite.com
 WORDPRESS_USERNAME=your_username
 WORDPRESS_APP_PASSWORD=your_application_password
 
+# Multi-Site Configuration (Optional)
+# If you want to analyze multiple WordPress sites, configure them here:
+# Leave empty to use primary site credentials
+
+# Site 1: mistergeek.net
+WORDPRESS_MISTERGEEK_URL=https://www.mistergeek.net
+WORDPRESS_MISTERGEEK_USERNAME=your_username
+WORDPRESS_MISTERGEEK_PASSWORD=your_application_password
+
+# Site 2: webscroll.fr
+WORDPRESS_WEBSCROLL_URL=https://www.webscroll.fr
+WORDPRESS_WEBSCROLL_USERNAME=your_username
+WORDPRESS_WEBSCROLL_PASSWORD=your_application_password
+
+# Site 3: hellogeek.net
+WORDPRESS_HELLOGEEK_URL=https://www.hellogeek.net
+WORDPRESS_HELLOGEEK_USERNAME=your_username
+WORDPRESS_HELLOGEEK_PASSWORD=your_application_password
+
 # OpenRouter API Configuration
 OPENROUTER_API_KEY=your_openrouter_api_key