Revise cookiecutter.json in starters

[DimedS]

Description

Now in our starters we have a cookiecutter.json file with:

{
    "project_name": "Spaceflights Pandas",
    "repo_name": "{{ cookiecutter.project_name.strip().replace(' ', '-').replace('_', '-').lower() }}",
    "python_package": "{{ cookiecutter.project_name.strip().replace(' ', '_').replace('-', '_').lower() }}",
    "kedro_version": "{{ cookiecutter.kedro_version }}",
    "tools": "none",
    "example_pipeline": "no"
}

and when using only starters users don't need "tools" and "example_pipeline" variables, looks like we just put some fake values there to make hooks code work. But it can mislead users, especially when building their own custom starters, where it's not clear why it's necessary to have that variables and what values should we put in and why.

Possible Implementation

I think it will be better to update hooks code to allow using cookiecutter.json without that variables.