Add protobuf breaking change check.

[dzmitryhil]

This change is 

[wojtek-coreum]

Reviewable status: 0 of 10 files reviewed, 1 unresolved discussion (waiting on @dzmitryhil, @miladz68, @silverspase, and @ysv)

a discussion (no related file):
Please explain during the daily what this PR is about because I have no idea what those new proto files are about

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[dzmitryhil]

Reviewable status: 0 of 10 files reviewed, 1 unresolved discussion (waiting on @miladz68, @silverspase, @wojtek-coreum, and @ysv)

a discussion (no related file):

Previously, wojtek-coreum (Wojtek) wrote…

Please explain during the daily what this PR is about because I have no idea what those new proto files are about

Sure.

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[wojtek-coreum]

Reviewed 9 of 10 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68, @silverspase, and @ysv)

[miladz68]

Reviewed 9 of 10 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @dzmitryhil, @silverspase, and @ysv)

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.github/workflows/proto.yml line 14 at r2 (raw file):

      - uses: bufbuild/buf-breaking-action@v1
        with:
          against: 'https://github.com/CoreumFoundation/coreum.git#branch=master'

empty line is needed.

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third_party/proto/google/api/httpbody.proto line 78 at r2 (raw file):

  // for streaming APIs.
  repeated google.protobuf.Any extensions = 3;
}

empty line here.

[dzmitryhil]

Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @miladz68, @silverspase, and @ysv)

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.github/workflows/proto.yml line 14 at r2 (raw file):

Previously, miladz68 (milad) wrote…

empty line is needed.

Done.

Code quote:

 against: 'https://github.com/CoreumFoundation/coreum.git#branch=maste

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third_party/proto/google/api/httpbody.proto line 78 at r2 (raw file):

Previously, miladz68 (milad) wrote…

empty line here.

Done.

Code quote:

// Application specific response metadata. Must be set in the first response

[miladz68]

Reviewed 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @silverspase, @wojtek-coreum, and @ysv)

[dzmitryhil]

Reviewed 8 of 10 files at r1, 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @silverspase, @wojtek-coreum, and @ysv)

[wojtek-coreum]

Reviewed 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @silverspase and @ysv)