Use TSC monorepo capabilities

[coyotte508]

tsc has monorepo capabilities I wasn't even aware of

you can add this to the root/base tsconfig.json:

		"composite": true,
		"incremental": true

and build with tsc -b

and in individual package.json, add "references": [{ "path": "..." }] to reference dependencies

And typescript takes care to cache builds, and build dependencies automatically. No need to do pnpm --filter package... build to build all sub-dependencies (and even if we keep that command, it'll be faster anyway due to caching)