Introduce pagination for feed JSON-RPC method

[mycognosist]

Turns out my feed is too big for JSON-RPC; the server implementation I'm using (https://docs.rs/jsonrpsee/0.22.0/jsonrpsee/index.html) defaults to a response body limit of 10 MB.

Pagination will need to be introduced to avoid this error. It'll also be a nice addition for client builders.

Error: JSON-RPC request failed with code -32008: Response is too big

Caused by:
    JSON-RPC request failed with code -32008: Response is too big