Add Generate a New project workflow

[andyduong1920]

https://github.com/nimblehq/elixir-templates/issues/??

What happened

Describe the big picture of your changes here to communicate to the team why we should accept this pull request.

Insight

Describe in details how to test the changes, which solution you tried but did not go with, referenced documentation is welcome as well.

Proof Of Work

Show us the implementation: screenshots, gif, etc.

[andyduong1920]

Close as this is less useful, the people who aren't contributors can't start the workflow.