Migrate Ormolu Live back to Miso

[amesgen]

Since #964, @TerrorJack added JavaScript FFI and TemplateHaskell support to the GHC WASM backend, so we can now seamlessly switch back to using Miso, simplifying Ormolu Live and superseding previous hacks/workarounds.

Uncompressed .wasm size decreases from 19.13MB to 18.19 MB overall:

• First, it gets slightly larger because twe now also have the UI logic in WASM, the JS size decreases correspondingly.
• It also gets larger because ghc-wasm-meta is using -O2 by default since !78.
• However, it gets significantly smaller because we no longer pre-initialize the fixity database using Wizer. In contrast to the original PR Pre-init Ormolu Live with Wizer #991, I didn't see any performance benefit of evaluating the embedded fixity info, so I removed it.

As it is quite convenient now with Miso + WASM, I also added pre-rendering for a nicer experience on initial page load.

As a side effect of upgrading Bulma to 1.0, we get a dark mode for free 😎

[github-actions]

🚀 Deployed on https://8e34bad072c798f2fc2bee29b6c56753db8d09af--ormolu-live.netlify.app