This adds rollup to the runtime and adds a new plugin to add the license banner
+ inject the `"use no memo"` directive. We need to inject it there as rollup
currently strips out unknown directives during bundling.
This PR makes all packages share the same typescript version and updates us to
latest versions of typescript, ts-node, typescript-eslint/eslint-plugin and
typescript-eslint/parser.
I also noticed that the tsconfig we were extending (node18-strictest) was
deprecated, so I switched us over to one that's more up to date.
Also had to make a couple of small changes to the playground so that continues
to build correctly.
Sorry about the thrash in advance! This removes the top level `forget` directory
which adds unnecessary nesting to our repo
Hopefully everything still works
