[FR]: `aspect init` should handle a `SIGINT` signal (keyboard interrupt / `CTRL +C`)

### What is the current behavior?

Today if I run `aspect init` it clones https://github.com/aspect-build/aspect-workflows-template: https://github.com/aspect-build/aspect-cli/blob/39875c856b24e185d93bcd0cbb1956245792767a/pkg/aspect/init/init.go#L76 and enters interactive mode. If a user do not proceed (hits `CTRL + C`) it does not gracefully handle this event.

It exits with status code = 1, prints `Error: user aborted` and leaves the cloned github.com directory in the current dir.

### Describe the feature

When an user aborts the init operation, it should cleanup changes done to the current workdir and do not treat it as an error.

Start at pkg/aspect/init/init.go around line 76, where aspect init clones the aspect-workflows-template and enters interactive mode. Reproduce the operation with CTRL+C, then verify that the cloned github.com directory is cleaned up and the command exits without treating the abort as an error.

Written by the indexing model from the issue text.