tRPC/json-rpc: normalize usage

[jknack]

It must follow how MCP works:

{
   // tRPC
   install(new Jackson3Module());
   install(new TrpcJackson3Module());
   install(new TrpcModule(new ServiceTrpc_()));
}

{
   // JSON-Rpc
   install(new Jackson3Module());
   install(new JsonRpcJackson3Module());
   install(new JsonRpcModule(new ServiceRpc_()));
}