common: change remove rnix-lsp, add nil and nixpkgs-fmt, move nix default package to common

configurations/host/Old-materusPC/configuration.nix

@@ -82,7 +82,6 @@ in
       ./hardware-configuration.nix
     ];
   boot.supportedFilesystems = [ "ntfs" ];
-  nix.package = pkgs.nixFlakes;
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
   nix.settings.auto-optimise-store = true;
   nix.settings.substituters = [

configurations/host/materusPC/extraHome.nix

@@ -13,7 +13,7 @@
     enableTerminalExtra = lib.mkDefault true;
     enableNixDevel = lib.mkDefault true;
     editor.code.fhs.enable = true;
-    editor.code.fhs.packages = (ps: with ps; let llvmpkgs = llvmPackages_16; in[
+    editor.code.fhs.packages = (ps: with ps; let llvmpkgs = llvmPackages_16; in [
       llvmpkgs.clang
       llvmpkgs.llvm
       llvmpkgs.bintools
@@ -26,6 +26,8 @@
       gcc
       gdb
       nil
+      nixfmt
+      nixpkgs-fmt
       cmake
       gnumake
       ninja