feat(ci): add release job

[vdice]

• adds a release job to the current circleci config

Adding in Draft as I'm a circleci newbie! Cobbled together after quick looks at docs/examples... Perhaps @silvin-lubecki can lend a hand in review/testing/etc. ?

TODO:

• add an GITHUB_TOKEN env var to the circleci project config that the release job can use, with the value of a valid github token for creating releases on this repo.

Contributes towards #90

[silvin-lubecki]

That looks good to me, thank you @vdice !! We should give it a try yes.

[vdice]

@silvin-lubecki my attempts at testing on my fork have been thwarted by failures in the initial build job, as in https://circleci.com/gh/vdice/cnab-to-oci/4. I'm also unable to run make all-ci locally successfully 😅 ... edit: oh, need to update import paths, etc., as is done in #95

[vdice]

@silvin-lubecki this should be ready to re-test once some of the dependent PRs are merged (#95, #97)... let's check back in when ready and I can rebase, etc.

[vdice]

😱 I think it's working! Note the new main CircleCI GH Check and link. We should be good to now remove the old status webhook (ci/circleci: build) from https://github.com/cnabio/cnab-to-oci/settings/hooks. <-- I'll defer to @radu-matei or @silvin-lubecki to do so.

Turns out it appears that enabling workflows are a prereq for GH checks, hence the addition in this PR:

[vdice]

As for testing the new release job... I'll need pointers from those more familiar w/ CircleCI on how to test before an actual tag push. Or, we just test it live on the next tag push and adjust if need be 😅 .

The configuration looks good according to https://circleci.com/blog/publishing-to-github-releases-via-circleci/#plain-circleci-2.0-example

[silvin-lubecki]

Not a circleci expert, but so far LGTM

[silvin-lubecki]

@vdice I removed the old check and added the main one as required. Thank you so much for investigating this 👍

[silvin-lubecki]

Oh crap I should have squashed before merging 🤦‍♂

[vdice]

Oops! My fault for not condensing commits beforehand 😅 .