Capture stdout and store as output

[GammaGames]

Possibly fixes #274, #38

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: SSH
        id: ssh
        uses: https://github.com/GammaGames/ssh-action@master
        with:
          host: [fill in]
          script: |
            ls -l ~/test/
      - name: echo
        run: echo "${{ steps.ssh.outputs.stdout }}"

If successful, it has the following in steps.ssh.outputs.stdout:

======CMD======
ls -l ~/test/
======END======
out: total 0
out: -rw-rw-r-- 1 user group 0 Jan  2 14:24 file1
out: -rw-rw-r-- 1 user group 0 Jan  2 14:24 file2
==============================================
✅ Successfully executed commands to all host.
==============================================

On error it acts like it does now.

[GammaGames]

One potential issue is that secrets aren't masked in the output variable like they are in the log. I was able to fix it with a filtering step, but it's manual:

- uses: mad9000/actions-find-and-replace-string@4
  id: filter
  with:
    source: ${{ steps.ssh.outputs.stdout }}
    find: '${{ secrets.value }}'
    replace: '***'
    replaceAll: true
- run: echo '${{ steps.filter.outputs.value }}'

[GammaGames]

fixed conflicts

edit: fixed conflicts