feat(haskell): update haskell-tools version and add formatters + linters (#6230)

## Description

- Updates `haskell-tools` to use the recommended version in the plugin's
README
- Adds `ormolu` as a formatter
- Adds keybindings for `haskell-tools` that does not conflict with
LazyVim's defaults.

## Related Issue(s)

-
https://github.com/LazyVim/LazyVim/discussions/3325#discussioncomment-9562683:
adds `ormolu` formatter.
- https://github.com/LazyVim/LazyVim/pull/2052#issuecomment-2881764491:
@mrcjkb keeps getting bug reports because the version is still in `3`
and should be updated to `6`.

## Checklist

- [x] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.

---------

Co-authored-by: Folke Lemaitre <folke.lemaitre@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>

lua/lazyvim/plugins/extras/lang/haskell.lua

@@ -14,17 +14,40 @@ return {
 
   {
     "mrcjkb/haskell-tools.nvim",
-    version = "^3",
+    version = false,
     ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
-    dependencies = {
+    keys = {
-      { "nvim-telescope/telescope.nvim", optional = true },
+      {
+        "<localleader>e",
+        "<cmd>HlsEvalAll<cr>",
+        ft = "haskell",
+        desc = "Evaluate All",
       },
-    config = function()
+      {
-      local ok, telescope = pcall(require, "telescope")
+        "<localleader>h",
-      if ok then
+        function()
-        telescope.load_extension("ht")
+          require("haskell-tools").hoogle.hoogle_signature()
-      end
         end,
+        ft = "haskell",
+        desc = "Hoogle Signature",
+      },
+      {
+        "<localleader>r",
+        function()
+          require("haskell-tools").repl.toggle()
+        end,
+        ft = "haskell",
+        desc = "REPL (Package)",
+      },
+      {
+        "<localleader>R",
+        function()
+          require("haskell-tools").repl.toggle(vim.api.nvim_buf_get_name(0))
+        end,
+        ft = "haskell",
+        desc = "REPL (Buffer)",
+      },
+    },
   },
 
   {
@@ -66,18 +89,49 @@ return {
     end,
   },
 
+  {
+    "nvim-telescope/telescope.nvim",
+    optional = true,
+    specs = {
       {
         "luc-tielen/telescope_hoogle",
         ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
-    dependencies = {
+        opts = function()
-      { "nvim-telescope/telescope.nvim", optional = true },
+          LazyVim.on_load("telescope.nvim", function()
-    },
+            require("telescope").load_extension("ht")
-    config = function()
+          end)
-      local ok, telescope = pcall(require, "telescope")
-      if ok then
-        telescope.load_extension("hoogle")
-      end
         end,
+        keys = {
+          {
+            "<localleader>H",
+            "<cmd>Telescope hoogle<cr>",
+            ft = "haskell",
+            desc = "Hoogle",
+          },
+        },
+      },
+    },
+  },
+
+  {
+    "stevearc/conform.nvim",
+    optional = true,
+    opts = {
+      formatters_by_ft = {
+        haskell = { "fourmolu" },
+        cabal = { "cabal_fmt" },
+      },
+    },
+  },
+
+  {
+    "mfussenegger/nvim-lint",
+    optional = true,
+    opts = {
+      linters_by_ft = {
+        haskell = { "hlint" },
+      },
+    },
   },
 
   -- Make sure lspconfig doesn't start hls,