haskell-config for nvim & ge_proton install script

nvim-config/lua/plugins/haskell.lua

@@ -0,0 +1,25 @@
+return {
+  "mrcjkb/haskell-tools.nvim",
+  ft = { "haskell", "lhaskell", "cabal" },
+  opts = {
+
+    hls = {
+      settings = {
+        haskell = {
+          formattingProvider = "fourmolu",
+          -- wir nutzen das interne Plugin, kein externes Binary nötig:
+          plugin = { fourmolu = { config = { external = false } } },
+
+          -- .cabal-Formatting komplett deaktivieren (sonst verlangt HLS cabal-fmt)
+          cabalFormattingProvider = "none",
+        },
+      },
+    },
+    -- optional: Safety im on_attach
+    on_attach = function(client, bufnr)
+      if vim.bo[bufnr].filetype == "cabal" then
+        client.server_capabilities.documentFormattingProvider = false
+      end
+    end,
+  },
+}