Export generated validate proto artifacts

[newyankeecodeshop]

This PR implements the feature request described by #151.

The generated file buf/validate/validate_pb.ts is now available as an export from @bufbuild/protovalidate/gen. The full import is @bufbuild/protovalidate/gen/buf/validate/validate_pb.js.

[CLAassistant]

All committers have signed the CLA.

[newyankeecodeshop]

Any time for a review @timostamm @jonbodner-buf ?

[timostamm]

Thanks for the PR!

It fails CI for two reasons:

1. We use @arethetypeswrong/cli to verify exports, and it doesn't support wildcards, unfortunately.
2. The modification to the example is overwritten by buf generate, and we generate in CI and check for diffs to make sure that the generated code does not drift.

To land this, the best way forward is to drop the change to the example for now, and fix the exports so that attw passes. You should be able to run npm run all to effectively do the same thing as CI.

Please also see #151 (comment) for details, especially the file extension for the exports, which should be .js for best portability.

[newyankeecodeshop]

Thanks @timostamm I have implemented the two changes you recommend. I could not get attw to pass because the "Node10" resolution is failing. I don't think this export can be supported under that module resolution, but it is also deprecated and being removed in TypeScript 7. What should I do?

"@bufbuild/protovalidate/gen/buf/validate/validate_pb.js"

node10: 💀 Resolution failed
node16 (from CJS): 🟢 (CJS)
node16 (from ESM): 🟢 (ESM)
bundler: 🟢 

[timostamm]

TS 7 support is a different bridge to cross.

Node10 resolution can be satisfied via typesVersions, see https://github.com/bufbuild/protobuf-es/blob/6d0c4448cd4fc17751099603f5c60a08dfe4a5be/packages/protobuf/package.json#L125 for an example.

[timostamm]

We'll need to do some more testing before we can release it, but let's get this merged!