feat: add an output locked

[suzuki-shunsuke]

• Add an output so that later action jobs can check if this action has acquired a lock #131

Add an output locked if mode is either lock or check.
This output is useful for other GitHub Actions jobs to check if the job acquires the lock.

e.g.

  lock:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    outputs:
      locked: ${{steps.lock.outputs.locked}}
    steps:
      - uses: suzuki-shunsuke/lock-action@c752be910ac812e0adc50316855416514d364b57 # v0.1.3
        id: lock
        with:
          mode: lock
          key: dev
      # ...

  unlock:
    runs-on: ubuntu-latest
    needs: lock
    permissions:
      contents: write
    steps:
      - uses: suzuki-shunsuke/lock-action@c752be910ac812e0adc50316855416514d364b57 # v0.1.3
        if: needs.lock.outputs.locked == 'true'
        with:
          mode: unlock
          key: dev

[suzuki-shunsuke]

I guess this should be false.

locked should be true only if the step has acquired a lock.

[suzuki-shunsuke]

Honestly, I want to remove already_locked if mode is check, but it's a breaking change.

[github-actions]

🚀 Pre-release v0.1.4-5 was created

Build link | Release

You can try the pre-release version in your workflows by changing version to v0.1.4-5.