feat(server): JSON-RPC specific middleware (#1215)

* refactor new jsonrpc middleware

* add jsonrpsee specific service trait

* use tower::ServiceBuilder for composable middleware

* revert changelog

* fix nits

* types: impl Clone

* clarify examples

* Update server/src/middleware/mod.rs

* Update server/src/transport/http.rs

* remove some boiler plate

* add back logging

* remove needless Arc

* remove clone bounds for Middleware

* add wrapper for tower::ServiceBuilder

* fix docs

* add modify request example

* add rate limit example

* fix some nits in rate limiting middleware example

* Meta -> Context

* restruct middleware module

* fix broken links

* grumbles: remove `Context`

* fix tests

* Update examples/examples/rpc_middleware_modify_request.rs

Co-authored-by: James Wilson <[email protected]>

* fix grumbles

* grumbles: adjust docs for method response

* grumbles: MethodKind::Unknown -> NotFound

* Update examples/examples/http_middleware.rs

* fix some nits in examples

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Co-authored-by: James Wilson <[email protected]>