Implemented scan action

[gregory-entro]

Using docker action with 2 inputs. It will scan all commits in repo
so it should be used with fetch-depth in actions/checkout@v4.

Example:

    steps:
      - name: 'Get PR commits'
        run: echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 1 ))" >> "${GITHUB_ENV}"

      - name: 'Checkout PR branch and all PR commits'
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          fetch-depth: ${{ env.PR_FETCH_DEPTH }}