IDEA: Implement Fetch strategies for other possible handlers

[ardatan]

Today we have many useful fetch strategies in GraphQL handlers. Most of them are basically based on how to handle HTTP requests. So it is possible to implement those in other handlers for example JSON Schema handler can have multiple baseUrls defined with different combination of strategies.

https://www.graphql-mesh.com/docs/handlers/graphql#fetch-strategies-and-multiple-http-endpoints-for-the-same-source