[Enhancement] HTTP & GRPC docs should be split from TCP protocol doc

The http and grpc documents are included inside the tcp document, and the http and grpc documents should be split from the tcp document.

https://eventmesh.apache.org/zh/docs/design-document/event-handling-and-integration/runtime-protocol

Start with the linked event-handling-and-integration/runtime-protocol page and locate the TCP protocol document containing the HTTP and gRPC material. Separate the HTTP and gRPC documentation from the TCP document; done means those documents are no longer included inside the TCP documentation.

Written by the indexing model from the issue text.