Avoid copying extra files to user project

[selenil]

I think it would be better to avoid copying files to the user project other than the components themselves. Files like helper.ex or component.ex could be used directly from SaladUI instead of generating in each project. The ZagHook and in general all hooks doesn't need to be copied either, users can just import it in their app.js file directly from SaladUI dependecy.

[bluzky]

@selenil 👍 users normally don't touch these files. Let's do this for v1. I think we should bump version after integrating all necessary components with Zagjs