feat(integration-service): Add integrations service

[HamadaSalhab]

[!IMPORTANT] Introduces a new integration service with FastAPI, Docker setup, and support for multiple integrations like DALL-E and Wikipedia.

• Integration Service:
  • Adds integrations-service with Docker setup in docker-compose.yml and Dockerfile.
  • FastAPI application in web.py with routers for execution and integration management.
• Models:
  • Defines models for DalleImageGenerator, DuckDuckGoSearch, HackerNews, Weather, and Wikipedia in models directory.
  • IntegrationExecutionRequest and IntegrationExecutionResponse for handling execution requests.
• Utilities:
  • Implements execute_integration in execute_integration.py to handle integration execution logic.
  • Integration utilities for DALL-E, DuckDuckGo, Hacker News, Weather, and Wikipedia in utils/integrations.
• Configuration:
  • Adds pyproject.toml for dependency management with Poetry.
  • Adds pytype.toml for type checking configuration.

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