CLI Clean Command

[SellersEvan]

Is your feature request related to a problem? Please describe.
Currently, there is no clear command to remove build directories.

Describe the solution you'd like
Add a clean command to the CLI that removes all build directories, like .sherpa and .vercel. This should just call each bundler and run the clean command for them. Also, add an option to have an input for the clean command.

Describe alternatives you've considered
N/A

Additional context

• Update templates and modules to add the clean command to the package.json
• Update the documentation on package.json