[Feature] add an integration with Contentful CMS

[marcinkrasowski]

Is your feature request related to a problem? Please describe.

We need to add a new integration for Contentful CMS to expand our application's support for multiple CMS platforms. This will enable users to seamlessly integrate with Contentful for managing and delivering content within the app.

Describe the solution you'd like

1. New Integration Module:
   • Create an integration module for Contentful CMS (similar to the existing Strapi integration).
   • Support basic functionalities such as fetching content, managing pages, and retrieving components.
2. Code Generation:
   • Enable code generation for GraphQL/REST queries , similar to the Strapi integration.
   • Include appropriate setup for to support Contentful's API. graphql-codegen
3. Documentation:
   • Create a detailed guide for using the Contentful integration, covering:
     • Prerequisites (e.g., Contentful account, API key).
     • Configuration steps for environment variables.
     • Sample queries and expected responses.
   • Provide sample content and content models to demonstrate integration features.