Ask to create Git repo when generating the base project

[tdashworth]

I think it would be useful to initialise and commit after the initial project generation and again commit/stage after each sub generation. This keeps track of the exact changes made by the generator.

If should be opt in which additional question at the end.

[tdashworth]

This will break the Azure DevOps generator which initialises the repo. This should be mitigated by checking before creating.

[tdashworth]

Adding in the generator version could be helpful for historical purposes.