Add protoc-gen-openapi v0.7.0

[mfridman]

Fix #821

[mfridman]

Suggested change

	name: buf.build/community/google-gnostic-openapi
	name: buf.build/community/google-openapi

This alternative drops the "gnostic" from the name, which would be more in line with our existing nomenclature conventions of: {owner}-{name}

Where the repository component {owner} is the upstream GitHub owner and the {name} is usually the name of the plugin minus protoc-gen- prefix.

However, for this particular one having the name "gnostic" in the name makes the most sense given the project's background. For some context:

• Feature Request: OpenAPI 3 support grpc-ecosystem/grpc-gateway#441
• Project Background, Goals, and Non-Goals google/gnostic#340

[mfridman]

Would like to wait for @pkwarren feedback before publishing this plugin.

[pkwarren]

I prefer having the gnostic in the name too.

[mfridman]

If we have some cycles, we should consider adding a sample image that imports:

import "google/api/annotations.proto";
import "openapiv3/annotations.proto";

That way we exercise bits of the plugin that actually use the annotations.

[pkwarren]

If we have some cycles, we should consider adding a sample image that imports:

import "google/api/annotations.proto";
import "openapiv3/annotations.proto";

That way we exercise bits of the plugin that actually use the annotations.

We did something similar to verify the grpc-gateway code. I think it would be good to do the same here but at least there is an openapi.yaml file generated for our existing inputs (even if it is mostly empty).

[pkwarren]

I prefer having the gnostic in the name too.