fix: ACNA-1808 - move action generators to their own repos

[shazron]

Related #204

How Has This Been Tested?

• npm test
• manual test
  • aio plugins link the app plugin
  • npm link this branch into the app plugin
  • aio app init --standalone-app
  • aio app deploy
  • aio app test

Types of changes

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

Checklist:

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

[codecov]

Codecov Report

Merging #206 (a8f202f) into master (c324a4b) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #206   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           16        11    -5     
  Lines          371       313   -58     
  Branches        44        44           
=========================================
- Hits           371       313   -58     

Impacted Files	Coverage Δ
generators/index.js	100.00% <ø> (ø)
generators/add-action/index.js	100.00% <100.00%> (ø)

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[moritzraho]

lgtm

[sandeep-paliwal]

LGTM