Angreal

Adds the `--values` flag to `angreal init` so that a user can pass a `values.toml` file in during initialization for rendering within the template.

render_dir` and `generate_context` exposed through python.

What's Changed
* render_dir python function by dylanbstorey in https://github.com/angreal/angreal/pull/81
* Build fix by dylanbstorey in https://github.com/angreal/angreal/pull/83


**Full Changelog**: https://github.com/angreal/angreal/compare/2.1.2...2.1.3

What's Changed
- small fixes to init behavior

python 3.12 support

Feels like we crossed a threshold to require a bump to 2.1.0 is all.

What's Changed
* angreal.render_template() by dylanbstorey in https://github.com/angreal/angreal/pull/71