haskellish tidal support

[felixroos]

add support for haskellish tidal, as drafted here: https://github.com/felixroos/haskell-tree-sitter-playground ( demo )

probably best to have hs2js as a separate library (just hs code -> js calls, without tidal specific logic), then add the rest as another package (wetcake?). Would be nice if the wasm files don't end up in git if possible

When this is done, a web component could be added that can be used in the tidal docs

[felixroos]

fixed with #870