feat: delete folder from project

[marikaris]

Test by logging in and then deleting a folder from armadillo:

armadillo.login("http://localhost:8080")
armadillo.delete_project_folder("project", "folder") # replace with a project and folder name in your armadillo

Verify the folder is gone, but the other folders in the project remain.

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.9%. Comparing base (71f33ce) to head (c0ba7ac).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
R/names.R	0.0%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #139     +/-   ##
========================================
+ Coverage    85.3%   85.9%   +0.6%     
========================================
  Files           9       9             
  Lines         526     549     +23     
========================================
+ Hits          449     472     +23     
  Misses         77      77             

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[timcadman]

Codecov would like a test for .split_and_unlist