Spike: Can bun.sh solve our OSS/EE library woes?

[jpellizzari]

We want to see if some of the fancy new JS/TS runtimes can help us avoid our current (bad) workflow of importing OSS into EE

What we want:

• When we save something in OSS, it should auto-magically appear in EE via hot reloading
• The ability to turn this off with an env var ^

This may involve moving to vite for builds, or other tooling changes.