Add emctl handling consul service registry and cookbook of it

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Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.03%. Comparing base (d0aad1e) to head (64edd45).
⚠️ Report is 49 commits behind head on main.

Files with missing lines	Patch %	Lines
emctl/cmd/client/util/visitor.go	0.00%	2 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
- Coverage   37.06%   37.03%   -0.04%     
==========================================
  Files          20       20              
  Lines        1972     1974       +2     
==========================================
  Hits          731      731              
- Misses       1118     1120       +2     
  Partials      123      123              

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