chore: Fix vite-demo type checking

[lanesawyer]

chore: Fix vite-demo type checking

What

• Fixes the vite-demo tsc command

How

• Added the -b flag. The tsc error was about an output file not matching an input file, so by building, we ensure everything is generated so the error doesn't pop up again. I don't pretend to entirely understand exactly why, but it does work and will check types on the demo!

[lanesawyer]

Welp, that didn't work lol

I reproduced the errors locally and then fixed it locally, but then it failed on CI while using tsc --noEmit 😭

[lanesawyer]

tsc -b worked, and that would also fail on type errors, so let's go with that! Updating PR description now