Flexible Haskell - a new plugin for JetBrains IDEs

(I added GitHub issues: Can't run HLS actions · Issue #12 · ilscipio/flexible-haskell-jetbrains-plugin · GitHub and java.lang.Throwable: Synchronous execution on EDT when opening a Haskell project · Issue #11 · ilscipio/flexible-haskell-jetbrains-plugin · GitHub)