Based on `@devraj` gist build a task endpoint to eject the project from the template

**Is your feature request related to a problem? Please describe.**
At the moment the user still has to eject the project by:
- Changing package names
- Updating references in alembic
- Adjusting project version numbers

**Describe the solution you'd like**
I had been maintaining a few `gists` on my own to [help with this](https://gist.github.com/devraj/d7c639a5a4e08117a2bfc10253a52818). The exercise is about formalising where I was headed with this and provide an endpoint via the `Taskfile`.

Note that should ensure the the user isn't accidentally performing this task.

Taskfile does support [user input](https://github.com/go-task/task/issues/92#issuecomment-370253942) which should be used to ask the user for confirmation.

**Describe alternatives you've considered**
Not applicable, this was always the plan.