action: implement and document bundle-only

[tnytown]

Summary

This changeset resolves #47 by adding the bundle-only setting, which disables the upload of .crt and .sig outputs.

Release Note

Implemented the bundle-only setting, which disables upload of .crt and .sig artifacts when used in conjunction
with upload-signing-artifacts and release-signing-artifacts.

Documentation

Documented in the README!

[woodruffw]

LGTM; let's go ahead and configure it in the release.yml workflow as well!

[tnytown]

The respective outputs will be uploaded when certificate or signature are specified along with this setting, but I don't see why someone would do that? I can add a check for that if we feel that it is necessary

[woodruffw]

The respective outputs will be uploaded when certificate or signature are specified along with this setting, but I don't see why someone would do that? I can add a check for that if we feel that it is necessary

Yeah, I was thinking about that -- IMO it's fine as is, since passing certificate and signature explicitly imply that they want specific filenames for those outputs, and that doesn't make much sense unless they explicitly end up as artifacts/assets.

That being said I think we can safely drop those two settings entirely with the next major release -- they stick out a bit and add unnecessary complexity to the action.

[woodruffw]

LGTM! I'll do a prerelease with this.