parse: implement enums with shift

gen: generate some doc comments

gen: implement enum parameters

gen: implement enums

gen/client: implement enums

parse: implement enums

gen/client: implement caps_out

gen/server: generate proper reply tag

gen/server: add temporary cast

gen/server: implement caps out

parse: fix empty caps in list

gen client: implement variadic caps

gen server: implement variadic caps

drop hello.ipc

Use lower-level IPC call setup

gen server: emit caps_in

gen client: emit caps_in

parse: implement cap lists

Adjust grammar for error types

This should make things a little bit less stupid imo

parse error declarations