Improve for the CLI

[B4nan]

When running pipx run crawlee it tries to create a project, while it should print a help message showing what commands are available, something like this:

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pipx run crawlee --version/-V is not working at all

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pipx run crawlee create foo fails hard when the directory already exists

Ideally, we should check this early and prompt the user for a different folder name (interactively), this needs to be cleared before we ask the user to pick the template.

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There is no success message after the template is created.

Should be something like the JS version is doing: