chore: lets use `pnpm`

[maraisr]

This should speed up our installs by like a super lot. And given that all workspace deps are linked by default, if you rebuild in one package — it'll reflect automatically in others.

Does this through a symlink.

Install:

pnpm install

Compile:

pnpm -r compile
#     ^ recursively find all `compile` scripts and run them

Later when we get to versioning, we will use something like changesets to automate this for us.

[rbalicki2]

Awesome, love it, thanks for doing this!!!