remove goccy

contrib/codecs/rdwr/codec.go

contrib/codecs/websocket/codec.go

contrib/extension/subscription/subscription.go

contrib/handlers/argreflect/json.go

go.mod

go.sum

pkg/jjson/json.go

pkg/jsonrpc/reqresp.go

pkg/jsonrpc/wire.go

pkg/server/rw_batch.go

pkg/server/server.go

readme.md