Visualize show instances

[DannieSheng]

Describe your changes Directly related to issue #652

Type of update Is this a:

• New feature or feature enhancement
• Work in progress

Associated issues #587

Additional context This pull request need to be merged before merging #587

[codecov[bot]]

Codecov Report

Merging #655 (7979d0e) into 4.x (e5b78d7) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               4.x      #655   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          145       146    +1     
  Lines         6662      6737   +75     
=========================================
+ Hits          6662      6737   +75     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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

Impacted Files	Coverage Δ
plantcv/plantcv/hyperspectral/read_data.py	100.00% <100.00%> (ø)
plantcv/plantcv/visualize/__init__.py	100.00% <100.00%> (ø)
plantcv/plantcv/visualize/display_instances.py	100.00% <100.00%> (ø)

[HaleySchuhl]

Archiving for now, plan to revisit.