feat. ACNA-594 - Omit code on action get

[florind-ens]

Description

By default omit code from the action payload, unless it's explicitly required.

Related Issue

https://github.com/adobe/aio-cli-plugin-runtime/issues/79

Motivation and Context

How Has This Been Tested?

unit test.

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #263 (615096f) into master (4ca7c1e) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #263   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           65        65           
  Lines         1674      1675    +1     
  Branches       316       317    +1     
=========================================
+ Hits          1674      1675    +1     

Impacted Files	Coverage Δ
src/commands/runtime/action/get.js	100.00% <100.00%> (ø)

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