wrap helix with lsp and formatter, and add some config for helix

pkgs/default.nix

@@ -5,6 +5,7 @@
 }:
 {
   pinentry-selector = pkgs.callPackage ./pinentry-selector.nix { };
+  helix = pkgs.callPackage ./helix.nix { inherit inputs; };
 }
 // (
   let

pkgs/helix.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  pkgs,
+  inputs,
+  ...
+}:
+pkgs.runCommand "helix-wrapped"
+  {
+    buildInputs = [ pkgs.makeWrapper ];
+  }
+  ''
+    mkdir -p $out/bin
+    makeWrapper "${lib.getExe inputs.helix.packages."${pkgs.system}".default}" $out/bin/hx \
+    --prefix PATH : ${
+      lib.makeBinPath (
+        with pkgs;
+        [
+          clang-tools
+          libxml2
+          typstyle
+          pyright
+          ruff
+          gotools
+          yaml-language-server
+          taplo
+          markdown-oxide
+          nixd
+          deno
+          nixfmt-rfc-style
+          vscode-langservers-extracted
+          fish-lsp
+          gopls
+          golangci-lint-langserver
+          tinymist
+          delve
+          lldb
+          rust-analyzer
+          nil
+        ]
+      )
+    }
+  ''