Print executed command in debug mode

[SaschaMann]

This makes it easier to debug complex workflows by printing the Julia command that is actually being run after filling in all the arguments and inputs.

Merge after #71.

See https://github.com/julia-actions/Example.jl/actions/runs/3866748151/jobs/6591076864

  env:
    ANNOTATE: false
    COVERAGE: true
    FORCE_LATEST_COMPATIBLE_VERSION: auto
    CHECK_BOUNDS: yes
##[debug]/usr/bin/bash --noprofile --norc -e -o pipefail /home/runner/work/_temp/c73a75ef-317c-4b80-a5f9-07f560a17540.sh
##[debug]The following Julia command will be executed: xvfb-run -a -s -screen 0 1024x768x24 julia --color=yes --depwarn=yes --inline=yes --project=@. -e include(joinpath(ENV["GITHUB_ACTION_PATH"], "test_harness.jl"))

[codecov-commenter]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (6a2ee04) compared to base (8d20cd7).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #72   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines            2         2           
=========================================
  Hits             2         2           

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