[enh, wip] adding cli with click (#297)

[djarecka]

Acknowledgment

• [ ] I acknowledge that this contribution will be available under the Apache 2 license.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Summary

• adding cli with click (pydracli)
• adding clean function to remove directories with .lock extension

Checklist

• [ ] All tests passing
• [ ] I have added tests to cover my changes
• [ ] I have updated documentation (if necessary)
• [ ] My code follows the code style of this project (we are using black: you can pip install pre-commit, run pre-commit install in the pydra directory and black will be run automatically with each commit)

[codecov[bot]]

Codecov Report

Merging #364 into master will decrease coverage by 3.27%. The diff coverage is 52.94%.

@@            Coverage Diff             @@
##           master     #364      +/-   ##
==========================================
- Coverage   85.69%   82.42%   -3.28%     
==========================================
  Files          20       21       +1     
  Lines        3761     3778      +17     
  Branches     1016     1019       +3     
==========================================
- Hits         3223     3114     -109     
- Misses        339      463     +124     
- Partials      199      201       +2     

Flag	Coverage Δ
#unittests	82.42% <52.94%> (-3.28%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pydra/engine/tools/click_main.py	52.94% <52.94%> (ø)
pydra/engine/boutiques.py	16.19% <0.00%> (-68.58%)	:arrow_down:
pydra/engine/task.py	74.14% <0.00%> (-10.60%)	:arrow_down:
pydra/engine/specs.py	84.74% <0.00%> (-2.18%)	:arrow_down:
pydra/engine/helpers_file.py	77.30% <0.00%> (-1.54%)	:arrow_down:

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