* Update rules_haskell
The workaround for linking against `Cffi` in the REPL has been
upstreamed in a more generalized form.
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* ghcide: Use rules_haskell's hie-bios support
* Document `ghcide` Bazel integration
* Rename files to match module names
Co-authored-by: Andreas Herrmann <andreas.herrmann@tweag.io>
