Comprehensive README update to match codebase
- Update tools list with all 15 actual tools, categorized by platform/function
- Remove non-existent blocks.py reference
- Add documentation for utilities: send_to_void, get_thread, notification_recovery, show_agent_capabilities
- Add Vision Support section documenting image processing capabilities
- Add Bluesky Downrank System section
- Update configuration example to match config.example.yaml structure
- Add bot.agent, threading, and logging config reference tables
- Add --simple-logs CLI option and config path note
- Add pillow to dependencies list
- Add new key features: vision, blog publishing, downrank system
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