Add dev dependencies to pyproject.toml

[ivirshup]

Motivation

It'd be nice to be able to set up a dev environment with pip install .[dev,experimental] than pip install .[experimental then pip install scripts/requirements-dev.txt

Definition of Done

pip install .[dev,experimental] will work

Tasks

• [ ] Move the deps from the requirements file to the toml
  • [ ] For dev deps
  • [ ] For documentation deps
• [ ] Update CI tasks to use this
• [ ] Update docs