feat: ultra dev

[deckchairlabs]

This is very much a WIP and not HMR (would only support basic window.reload)

Theres a new example basic-dev utilising the new createDev. Basically it creates a temp directory and moves everything into that, we need to properly filter out ignored files etc.

What works

• The server starts (yay) and serves requests

What isn't working

• The paths are all screwed up, the client hydration script attempts to be loaded from /_ultra/compiler/[temp path]/client.tsx which then throws an error.
• Need to inject a websocket script so we can trigger a window reload
• Need to handle removing files without causing an error
• Need to test that appending a timestamp to the main entrypoint server.tsx works as intended for it's dependencies ie. changing something in app.tsx for instance.

[talentlessguy]

here's a relatively simple implementation of HMR for ESM: https://github.com/FredKSchott/esm-hmr