Update post_gen_project.sh

Be explicit about the git init step; users who use a different vcs can also swap out the code below this step.

Merge pull request #2 from associatedpress/default-package-setup

Update README.md

added notes to README

templates setup added to jupyter script, quarto config options added, ipynb template files added to cookiecutter template

jupytext and templates added to default installs

pain points added to readme

added script to configure local jupyter and set up the kernel using the git hack

added default package installs for jupyter

added line describing UV package install

Add git initialization here

Add uv commands; still need to figure out jupyter stuff

title change

Initial commit based on generic project template