Create CLI plugin system

[ealmloff]

trafficstars

Adds a WASI plugin to the CLI that will allow users to write plugins in Rust (instead of the Lua plugin system added in https://github.com/DioxusLabs/dioxus/pull/1672)

[notion-workspace[bot]]

Extensions builtin tailwind

[ghost]

All CSS utility feature requests are blocked by this:

1. #1192
2. #2813
3. #2425

API-wise we probably want a way for plugins to add assets to the manganis manifest, i.e. run tailwind/whatever in on_watched_paths_change and add the tailwind/whatever output as a CSS asset.