added haskell development setup to neovim configuration

modules/editor/neovim.nix

@@ -46,6 +46,7 @@ let
     pkgs.tinymist
     pkgs.dart
     pkgs.tree-sitter
+    pkgs.haskell-language-server
   ];
 in
 {

modules/editor/neovim/lua/plugins/spec/lsp.lua

@@ -120,7 +120,8 @@ local function lsp_setup()
 		'eslint',
 		'nushell',
 		'tinymist',
-		'dartls'
+		'dartls',
+		'hls'
 		-- 'jdtls'
 	})
 
@@ -159,6 +160,9 @@ local function lsp_setup()
 	}))
 
 	vim.lsp.config('dartls', with_defaults(require("plugins.spec.server_configurations.dart")))
+	vim.lsp.config('hls', with_defaults({
+		cmd = { "haskell-language-server-wrapper", "--lsp" },
+	}))
 
 	vim.diagnostic.config({
 		virtual_text = {