Catch DEST_NOT_EMPTY error

[cossssmin]

If we try scaffolding a project to an existing directory, the operation will fail as expected.

But we're not catching that error so the spinner goes on:

DegitError: destination directory is not empty, aborting. Use options.force to override
    at Degit._checkDirIsEmpty (\create-maizzle\node_modules\degit\dist\index-688c5d50.js:14171:12)
    at Degit.clone (\create-maizzle\node_modules\degit\dist\index-688c5d50.js:14089:8)
    at main (file:///create-maizzle/src/index.js:109:17)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
  code: 'DEST_NOT_EMPTY'
}
◑  Creating project...

[cossssmin]

Additionally, we could support a --force flag to force copying the files to the destination.