doc: check and update contributor guide

[musslick]

• Modules @musslick @younesStrittmatter
• Core @benwandrew
• Notebooks @musslick
• Development Setup @TheLemonPig (try this out while incorporating new BMS tutorial into autora repo)
• Pre-Commit Hooks @benwandrew
• Remove the distinction between samplers and poolers from the "experimentalist" module doc @benwandrew
• In the index.md of the contributor guide, add the "autora-workflow" description to the autora-core description in the section "Core Contributions"

[musslick]

• make sure everything is aligned with new terminology: https://docs.google.com/presentation/d/1OdP4M2ByW8GKTFvcCgDG5HDzUwHKdFEhj1ddH4ClvEw/edit#slide=id.g27e19158dea_1_0
• make sure it works
• no more pooler/sampler distinction
• make sure to encourage the use of type hints for module contributions
• make sure it conforms with the state logic (if it is relevant for the corresponding section)

[musslick]