poly create: produces invalid Python code when the --name contains a path

[DavidVujic]

Describe the bug
The command will create a component with imports, but with invalid Python, when using the create command like this: poetry poly create component --name=foo/bar

The output will be something like:

from top_ns.foo/bar import core

Described in #45

Expected behavior
The command should generate python files with correct import statements, such as:

from top_ns.foo.bar import core