Update dependencies

[TrebuhD]

Disclaimer : After merging

• Please update to the current LTS version of node
• After installing the above, you should install yarn since we don't use yarn classic anymore (it's been deprecated): https://yarnpkg.com/getting-started/install

Changes

• Updated all packages except for eslint (leaving this for later as it's a large migration)
• Migrated from Yarn Classic to the current version of yarn. This should make working with the package manager faster and nicer to use!
• Migrated to the turbopack bundler for local development builds. The site & all routes should now build much faster.

[TrebuhD]

Thanks for the review @aminahbl !

would it be good to include a .nvmrc file?

I don't use nvm (I use https://volta.sh) and that is already in the package.json file. If you use nvm and it would help you, please feel free to add it to the project!

would it be good to include a very brief line in the README about yarn?

It's already there! Let me know if you think it should be enhanced

is some configuration need for Turbopack?

I don't think so, I'm trying to find out why it's displaying this warning! Will keep you posted.

did the MUI update cause some funkiness?

Looks like it, I also noticed it, but only in this place. We don't modify these MUI sliders, right?