Flyte enables production-grade orchestration for machine learning workflows and data processing created to accelerate local workflows to production.

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<https://github.com/flyteorg/flytekit/pull/1665|#1665 Updates to pyflyte init templating>
Pull request opened by <https://github.com/zeryx|zeryx>
*TL;DR*

This PR removes the cookiecutter templating system for `pyflyte init`, and instead uses gitpython, without templating.  
This is part of a wider effort to replace our Dockerfile / docker_build.sh systems with the much simpler `ImageSpec`.

This PR depends on <https://github.com/flyteorg/flytekit-python-template/pull/40|flyteorg/flytekit-python-template#40>

*This is a breaking change*  
All templates are now imagespec based, and cookiecutter is no longer used to generate custom readme titles or directory names.

*Type*

☐ Bug Fix
☑︎ Feature
☐ Plugin

*Are all requirements met?*

☑︎ Code completed
☑︎ Smoke tested
☐ Unit tests added
☑︎ Code documentation added
☐ Any pending items have an associated Issue

*Complete description*

As discussed as part of the larger Flyte example improvement with newly introduced imagespec.
<https://github.com/flyteorg/flytekit|flyteorg/flytekit>
GitHub Actions: build-plugins (3.11, flytekit-bigquery)
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