provide a command-line interface for Dash

Thanks so much for your interest in Dash!

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Is your feature request related to a problem? Please describe.
I see that some ideas are related to this sentiment of Dash needing a CLI. Some people have suggested cookiecutter. I think Dash needs a cli created in a directory cli/. Some commands I think would be great off the bat.

dash create-app <project-name> - create a project with certain directories, including a venv directory
dash run --dev - run a dash app with or without debug mode

Possibly even add a command to run in Docker

Describe the solution you'd like
A directory that is dedicated to the cli/ that contains all of the logic and the commands needed

Describe alternatives you've considered
I've considered creating a separate repo for this, but it makes the project sloppy and updates can get out of sync. I've also seen cookiecutter as a workaround, but for similar reasons, I think a dedicated cli that is in the repo is a better alternative. Even if that cli uses cookiecutter under the hood.

Start by reviewing the repository structure and the proposed cli/ directory boundary, then inspect how Dash applications are currently created and run. Compare the requested dash create-app and dash run --dev commands with existing project workflows. Done would require an agreed CLI design, project-generation behavior, run and debug behavior, and any Docker scope.