improve goctl rpc new

[dfang]

Describe the bug

 λ goctl rpc new
[goctl-env]: preparing to check env

[goctl-env]: looking up "protoc"
[goctl-env]: "protoc" is installed

[goctl-env]: looking up "protoc-gen-go"
[goctl-env]: "protoc-gen-go" is installed

[goctl-env]: looking up "protoc-gen-go-grpc"
[goctl-env]: "protoc-gen-go-grpc" is installed

[goctl-env]: congratulations! your goctl environment is ready!
goctl error: <input>:3:9: found ";" but expected [package identifier]
goctl env:
GOCTL_OS=darwin
GOCTL_ARCH=amd64
GOCTL_HOME=/Users/mj/.goctl
GOCTL_DEBUG=true
GOCTL_CACHE=/Users/mj/.goctl/cache
GOCTL_VERSION=1.3.3
PROTOC_VERSION=3.19.4
PROTOC_GEN_GO_VERSION=v1.27.1
PROTO_GEN_GO_GRPC_VERSION=1.1.0

To Reproduce
run goctl rpc new without any flags or args

1. The code is

2. The error is

Expected behavior

show help or output an error that needs a rpc service name

Screenshots
If applicable, add screenshots to help explain your problem.

Environments (please complete the following information):

• OS: [e.g. Linux]
• go-zero version [e.g. 1.2.1]
• goctl version [e.g. 1.2.1, optional]

More description
Add any other context about the problem here.

[noahlann]

你得提供参数啊 goctl rpc new xxx

虽然我现在也用不了这个命令。

goctl error: unsupported plugin protoc-gen-go which installed from the following source:
google.golang.org/protobuf/cmd/protoc-gen-go,
github.com/protocolbuffers/protobuf-go/cmd/protoc-gen-go;

Please replace it by the following command, we recommend to use version before v1.3.5:
go get -u github.com/golang/protobuf/protoc-gen-go

等会儿去降个版本试试看。