Add support for editions

[villem]

Hi,

We are using very recent addition to protobuf: opaque API. This requires edition = 2023. Currently an error:

:1:1: found "edition" but expected [.proto element {comment|option|import|syntax|enum|service|package|message}]

is given. More info about editions: https://protobuf.dev/editions/overview/

[lasorda]

#26 use master check again

[villem]

Hi I'm using now: 6e366e0. I'm getting a little further
We have this in our proto file:

option features.(pb.go).api_level = API_OPAQUE;

It causes this error

<input>:6:17: found "(" but expected [option value assignment =]

[lasorda]

Hi I'm using now: 6e366e0. I'm getting a little further We have this in our proto file:

option features.(pb.go).api_level = API_OPAQUE;

It causes this error

<input>:6:17: found "(" but expected [option value assignment =]

I use https://github.com/emicklei/proto to parse proto file, you can check you proto with emicklei/proto

[villem]

Yes, I get the same error with HEAD of https://github.com/emicklei/proto, using Readme.md test program and printing error of unsuccessful Parse:

` definition, err := parser.Parse()

	if err != nil {
		fmt.Println(err)
		return
	}

`