feat: add github release discussion category configuration option

[maikelvdh]

This allows to enable to create a discussion from a GitHub release. See: https://github.blog/changelog/2021-04-06-releases-support-comments-and-reactions-with-discussion-linking/

[jstmlr]

LGTM.

Does this require extra permissions that need to be documented?

[maikelvdh]

Does this require extra permissions that need to be documented?

No same permissions seem required, though as mentioned here in case one will configure this on a repository then this repository should have discussions enabled and have the category name configured also established. There is no RestAPI yet for discussions it seems which we could leverage to validate this from within the code, though given the errors are pretty clear I don't think that is a big deal for now.

[KevinDeJong-TomTom]

Does this require extra permissions that need to be documented?

No same permissions seem required, though as mentioned here in case one will configure this on a repository then this repository should have discussions enabled and have the category name configured also established. There is no RestAPI yet for discussions it seems which we could leverage to validate this from within the code, though given the errors are pretty clear I don't think that is a big deal for now.

I believe that information around availability of repository features (issues, discussions, ..) is already present in github.context.payload.pull_request.base.repo, which you can directly access. See also; https://docs.github.com/en/webhooks/webhook-events-and-payloads#pull_request

[maikelvdh]

I believe that information around availability of repository features (issues, discussions, ..) is already present in github.context.payload.pull_request.base.repo, which you can directly access. See also; https://docs.github.com/en/webhooks/webhook-events-and-payloads#pull_request

Correct that is possible, though given the clear error messaging in case it is not present and the configuration is quite descriptive towards discussions I decided to leave it out.