Implement comprehensive config system and clean up codebase

Major changes:
- Add Pydantic-based configuration system (bot/config.py, bot/config_manager.py)
- Add config.yaml with all service URLs, models, and feature flags
- Fix config.yaml path resolution in Docker (check /app/config.yaml first)
- Remove Fish Audio API integration (tested feature that didn't work)
- Remove hardcoded ERROR_WEBHOOK_URL, import from config instead
- Add missing Pydantic models (LogConfigUpdateRequest, LogFilterUpdateRequest)
- Enable Cheshire Cat memory system by default (USE_CHESHIRE_CAT=true)
- Add .env.example template with all required environment variables
- Add setup.sh script for user-friendly initialization
- Update docker-compose.yml with proper env file mounting
- Update .gitignore for config files and temporary files

Config system features:
- Static configuration from config.yaml
- Runtime overrides from config_runtime.yaml
- Environment variables for secrets (.env)
- Web UI integration via config_manager
- Graceful fallback to defaults

Secrets handling:
- Move ERROR_WEBHOOK_URL from hardcoded to .env
- Add .env.example with all placeholder values
- Document all required secrets
- Fish API key and voice ID removed from .env

Documentation:
- CONFIG_README.md - Configuration system guide
- CONFIG_SYSTEM_COMPLETE.md - Implementation summary
- FISH_API_REMOVAL_COMPLETE.md - Removal record
- SECRETS_CONFIGURED.md - Secrets setup record
- BOT_STARTUP_FIX.md - Pydantic model fixes
- MIGRATION_CHECKLIST.md - Setup checklist
- WEB_UI_INTEGRATION_COMPLETE.md - Web UI config guide
- Updated readmes/README.md with new features

.gitignore

@@ -1,3 +1,4 @@
+# ============================================
 # Python
 __pycache__/
 *.py[cod]
@@ -26,9 +27,11 @@ models/*.bin
 # Keep the directory structure
 !models/.gitkeep
 
-# Environment variables
+# Environment variables & Secrets
 .env
 .env.local
+.env.*.local
+*.secret
 
 # Logs
 *.log
@@ -43,4 +46,37 @@ Thumbs.db
 
 # Bot memory (contains user data)
 bot/memory/*.json
+bot/memory/autonomous_context.json
 !bot/memory/.gitkeep
+
+# Sensitive files
+*credentials*.json
+*secrets*.json
+*keys*.json
+*cookies*.json
+
+# Test outputs
+*.tmp
+*.temp
+test_output.*
+output/
+temp_*
+
+# Audio files (except static assets)
+*.mp3
+*.wav
+*.ogg
+!static/audio/*.mp3
+!static/audio/*.wav
+
+# Images (except static assets)
+*.png
+*.jpg
+*.jpeg
+*.gif
+!static/images/*
+
+# Backups
+backups/
+*.bak
+*.backup