532 publish proto files

[amberzsy]

Description

publish example protobufs generated with semi-automation tooling

TODO:

1. add support for compile protos. (make sure no syntax error etc)
2. generate protobuf language clients in spec repo.

after second thought on proposal, submodule not optimal ideas.
probably, we should do

1. Raw proto (which generated from Spec with certain tooling) defined in /protobuf. it should be machine generated files. But for now, i have it as handwritten ones to unblock grpc poc effort.
2. protobuf compile should compile the raw proto into *.proto (or some jars) in the release.
3. similar to opensearch-java which download https://github.com/opensearch-project/opensearch-java/blob/c7103d87423e44aa5ef57bb940496a6e3b74ff78/java-codegen/build.gradle.kts#L75 the output yaml file from release, the Core and OpenSearch-Java or other language client can download/pull from spec repo.

cc: @karenyrx @dblock for review and better idea.

Issues Resolved

#532

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

Spec Test Coverage Analysis

Total	Tested
517	349 (67.5 %)

[github-actions]

Changes Analysis

Commit SHA: ad83bfe
Comparing To SHA: 07e329e

API Changes

Summary

NO CHANGES

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/11889503341/artifacts/2200450788

API Coverage

	Before	After	Δ
Covered (%)	588 (57.59 %)	588 (57.59 %)	0 (0 %)
Uncovered (%)	433 (42.41 %)	433 (42.41 %)	0 (0 %)
Unknown	35	35	0

[dblock]

Were these authored by hand or a result of a tool?

I'd like to merge a little bit more than this, some kind of useful MVP, that for example contains these files and just enough README information of what they are, maybe some CI.

[amberzsy]

Were these authored by hand or a result of a tool?

for now, it's authored by hand. but eventually it would be machine generated code from spec.

I'd like to merge a little bit more than this, some kind of useful MVP, that for example contains these files and just enough README information of what they are, maybe some CI.

yes, make sense.