chore: move jQuery & what-input to peerDependencies #11290

chore: move jQuery & what-input to peerDependencies #11290

peerDependencies is for dependencies that are exposed to (and expected to be used by) the consuming code, as opposed to "private" dependencies that are not exposed, and are only an implementation detail.

* We need `jQuery` and `motion-ui` as peerDependencies instead of dependencies because we actually expect the user to install them. We cannot simply remove them because we still need the package managers to check for versions compatibilities and warn the user if they are missing.
* We need `jQuery` and `motion-ui` as devDependencies too because we use them for tests/build/documentation and peerDependencies are not installed (even in development mode - https://github.com/yarnpkg/yarn/issues/1503).

See https://github.com/zurb/foundation-sites/issues/11290