Develop with Wasm GHCI browser mode instead of JSaddle #1404
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The stuff in the last commit doesn't work yet for a few reasons. GHCIWatch doesn't work with multiple components (MercuryTechnologies/ghciwatch#316), although I'm close to a workaround for this. Note that GHCID doesn't work at all with the Wasm GHCI browser mode, as discovered a few days ago on the Miso Matrix channel. And anyway, Wasm browser mode doesn't work with multiple components in the first place, as I've just discovered and also raised on Matrix.
Since I collapsed the frontend components together in an earlier commit,
make -f Makefile.wasm32 frontend-watchdoes work, and allows us to get reload-on-save behaviour for changes inprimer-miso. However, this is not much use until the browser mode supports hosting static files, because the Primer app is pretty unusable without its CSS. In the meantime, it'd probably be good to splitMiso.hsin order to speed up reloads.