feat: Add Kind() method to EdgeX error interface

[jackchenjc]

closes #978

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Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 43.06%. Comparing base (a8c5c64) to head (9172608).

Files with missing lines	Patch %	Lines
errors/types.go	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #979      +/-   ##
==========================================
- Coverage   43.07%   43.06%   -0.02%     
==========================================
  Files         117      117              
  Lines        7162     7164       +2     
==========================================
  Hits         3085     3085              
- Misses       3736     3738       +2     
  Partials      341      341              

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[cloudxxx8]

LGTM