refactor: switch from npm workspaces to pnpm

RELEASE_ALL

* chore(pnpm): update lockfile

* chore(pnpm): add pnpm

* chore(pnpm): get rid of private:true

which was only needed for yarn workspaces; also, remove the csb workaround, because it didn't work with private:true

* chore(pnpm): switch to workspace:* dependencies

because pnpm will replace them automatically during publish

* chore(pnpm): use ^ dependencies for examples

we will always get the latest version as there is no lockfile for them

* chore(pnpm): update publish script to use pnpm

this also means we don't need to update package.json at all because we use workspace dependencies now

* chore(pnpm): devtools need react-error-boundary

* chore(pnpm): replace lerna with pnpm

* chore(pnpm): use pnpm to install in CI

* chore(pnpm): fix install in ci

* chore(pnpm): fix yml syntax

* chore(pnpm): add jest-dom to react-query

* chore(pnpm): add jest-dom to types

* chore(pnpm): explicitly add jest-dom typings

* chore(pnpm): revert jest-com changes

* chore(pnpm): ok prettier, whatever

* chore(pnpm): go to pnpm v7

* chore(pnpm): use stricter node version

* chore(pnpm): oh boy

* chore(pnpm): remove engines

because codesandbox-ci has a different version

* chore(pnpm): restore updating version in publish script

* chore(pnpm): filter pnpm scripts and installs down to ./packages

so that we exclude examples

* chore(pnpm): remove filtering from installs

as it doesn't install top-level dependencies; also, --frozen-lockfile is the default for CI environments