If not resuming, remove intermediate dir.

[delucchi-cmu]

Change Description

Closes #58. Closes #216 .

Solution Description

If the user specifies resume=False, then remove the intermediate directory instead of throwing an error. If we are resuming from prior state, give a warning (and catch this warning in testing, as it's a good indication that we've picked up some prior state and we're using it).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.74%. Comparing base (c0b3546) to head (6362618).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #244      +/-   ##
==========================================
- Coverage   99.75%   99.74%   -0.01%     
==========================================
  Files          24       24              
  Lines        1203     1198       -5     
==========================================
- Hits         1200     1195       -5     
  Misses          3        3              

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[wilsonbb]

Thanks!