Generate web or actions keys in app.config.yaml only when necessary

[MichaelGoberling]

This pull request proposes only generating the web or actions keys in app.config.yaml when the user initializes an application with the features associated with those keys.

Description

This pull request adds a conditional check during project generation to only add the web or actions keys in app.config.yaml if the user's response to the feature prompt during the aio app init command indicates they are needed.

Related Issue

Closes adobe/aio-cli-plugin-app#555

Motivation and Context

Remove bloat from configuration.

How Has This Been Tested?

npm run test

Screenshots (if appropriate):

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 #196 (5aee0dd) into master (9b43a3b) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #196   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines          393       392    -1     
  Branches        44        46    +2     
=========================================
- Hits           393       392    -1     

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

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9b43a3b...5aee0dd. Read the comment docs.

[purplecabbage]

moved my comment inline ....
LGTM, with a minor suggestion

[moritzraho]

lgtm