Create initial project contents from a cookiecutter

[dave-shawley]

It would be nice to reintegrate our cookiecutter support into the new project creation pipeline. The earlier support for running cookiecutters to create an initial commit was only implemented for Python codebases. The support was removed when the project creation automations were introduced. We can implement a first commit automation on a per-project type basis. The pre/post hooks added to cookiecuter project can be used to handle post-formatting and other repository cleanup tasks that plagued us in the past.