Change generated code for version 3 release

[stepancheg]

• Remove get_ prefix from functions as API guide suggests
• Make all fields public
• All singular fields should have getters (including singular proto3 fields)
• Only oneof fields should have set_xxx and has_xxx methods

[chanced]

First off, thank you for your work on this project. It is by no means a small undertaking!

Would you mind exposing/generating all of the compiler related protobuf files? A lot of enums are not currently available, such as Name, IdempotencyLevel, NamePart, JsType and so on.

I'm working on a port of protoc-gen-star to rust here and it'd be really helpful if they were all available on this crate. I initially started with prost but it doesn't support unknown fields which I'll need for extension parsing.

I could generate them myself but it looks like you've modified the output somewhat? I could be wrong there.

Thanks again!

[stepancheg]

These types are present in rust-protobuf v3 (which is not release yet).

In rust-protobuf v2 probably code just need to be regenerated, but releasing v3 is my priority now.

[chanced]

@stepancheg ugh, I'm sorry! I did a search across the repo and couldn't find them. Thank you!