Add keep-tags multi-line input

[vlaurin]

Resolves #9
Ability to exclude versions from pruning by exactly matching at least one tag to keep.

[vlaurin]

@FlippievanDyk here you go, this is adding both keep-tags and keep-tags-regexes as multi-line inputs.

Do you want to give it a spin? It got tested as part of the workflow on this PR but outside of that I don't have a use-case for it myself.

You should be able to use it by referencing this branch directly, like so:

steps:
  - name: Prune
    uses: vlaurin/action-ghcr-prune@9-keep-tags
    with:
      token: ${{ secrets.YOUR_TOKEN }}
      organization: your-org
      container: your-container
      dry-run: true # Dry-run first, then change to `false`
      tag-regex: your-regex
      keep-tags: |
        first-tag
        second-tag

For more details, feel free to have a look at the changes to the README and action.yml on this PR. If you are happy with it, I'll release it next.

[FlippievanDyk]

Do you want to give it a spin? It got tested as part of the workflow on this PR but outside of that I don't have a use-case for it myself.

Awesome! I will try to test it out in this week, and I 'll give feedback as soon as that's done.

[FlippievanDyk]

Finally got around to testing this.

I don't have a use for keep tags-regex at the moment, but keep-tags works perfectly!

Thank you so much for this, it is exactly what I was after.

[vlaurin]

@FlippievanDyk great, thank you for giving it a spin, I'm going to release it now :)