feat: add complete multi-agent AI system with Telegram bot

Initial implementation of MultiAgentsAI featuring:
- Dynamic agent configuration via environment variables
- SQLite database and JSON daily context storage
- OpenRouter API integration for multiple AI models
- Telegram bot with commands for control, history, and interaction
- Autonomous conversation loop with pause/resume and agent silencing
- Model testing and statistics commands

.gitignore

@@ -0,0 +1,10 @@
+# Arquivos sensíveis e gerados — NÃO commitar
+.env
+venv/
+agents.db
+Contexts/*.json
+__pycache__/
+*.pyc
+*.pyo
+.pytest_cache/
+tests/