Update protobuf to 3.0.0

[hchan10]

• Regenerate new protobuf files

• Resolve issues caused by the protobuf update

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[bartekpacia]

Thanks for the PR!

I'd like to do it but for now, we've gotta support Flutter 3.3 and Flutter 3.7.

Also, the fact that the generated API changed so much (Selector(text: 'hey') -> Selector..text = 'hey') will probably mean we'll have to add some compatibility code by hand. We don't want breaking changes because of a dependency update.

[shilangyu]

After a backlash from this change in generation (making migration extremely tedious and result in worse code), they are working on adding a flag to restore the old behavior: google/protobuf.dart#855. Probably worth to wait for it?

[bartekpacia]

Thanks for info @shilangyu, I'm happy they're bringing back the old syntax. Let's wait.

[bartekpacia]

google/protobuf.dart#855 is done, but we're blocked because its newewst version requires Dart 2.19, and our current min is Dart 2.18 (from Flutter 3.3).

[bartekpacia]

Thank you for the contribution, but we decided to ditch protobufs and gRPC in #1567.