Added support for composer create-project

[tannguyen04]

Checklist before requesting a review

closes #160

• I have formatted the subject to include ticket number as [#123] Verb in past tense with dot at the end.
• I have added a link to the issue tracker
• I have provided information in Changed section about WHY something was done if this was not a normal implementation
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• I have run new and existing relevant tests locally with my changes, and they passed
• I have provided screenshots, where applicable

Changed

Screenshots

[github-actions]

🚀 Deployed on https://6642ca278081d55dd7da75b1--drupal-extension-scaffold-docs.netlify.app

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.22%. Comparing base (549a63d) to head (22e2318).
Report is 1 commits behind head on 1.x.

Additional details and impacted files

@@             Coverage Diff             @@
##              1.x     #161       +/-   ##
===========================================
- Coverage   77.06%   22.22%   -54.84%     
===========================================
  Files           8        2        -6     
  Lines         449       27      -422     
===========================================
- Hits          346        6      -340     
+ Misses        103       21       -82     

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[AlexSkrypnyk]

please do not do this. The whole point was to hide all the scaffold stuff inside of the .scaffold dir so that the consumers can see a clean structure with just one odd directory .scaffold.

Please revert this back and any other overrides.

The task was to only update a couple of fields in composer.json and store everything in .scaffold.