use local virtual envs (merging in from master)

[tnixon]

Changes

bringing in a change from master - make virtual envs in project-local dirs

Functionality

• added relevant user documentation
• added a new Class method
• modified existing Class method: ...
• added a new function
• modified existing function: ...
• added a new test
• modified existing test: ...
• added a new example
• modified existing example: ...
• added a new utility
• modified existing utility: ...

Tests

• manually tested
• added unit tests
• added integration tests
• verified on staging environment (screenshot attached)

[R7L208]

LGTM! Thanks for porting this over

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.76%. Comparing base (f022563) to head (8662ef3).
⚠️ Report is 152 commits behind head on v0.2-integration.

Additional details and impacted files

@@                 Coverage Diff                  @@
##           v0.2-integration     #460      +/-   ##
====================================================
- Coverage             85.46%   77.76%   -7.71%     
====================================================
  Files                     6       30      +24     
  Lines                   757     2802    +2045     
  Branches                156      468     +312     
====================================================
+ Hits                    647     2179    +1532     
- Misses                   92      461     +369     
- Partials                 18      162     +144     

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