neovim:init.vim->init.lua and misc changes

modules/nvidia-offload.nix

@@ -1,31 +0,0 @@
-{config, pkgs, ... }:
-let
-  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
-    export __NV_PRIME_RENDER_OFFLOAD=1
-    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
-    export __GLX_VENDOR_LIBRARY_NAME=nvidia
-    export __VK_LAYER_NV_optimus=NVIDIA_only
-    exec -a "$0" "$@"
-  '';
-in
-  {
-    environment.systemPackages = with pkgs; [
-      nvidia-offload
-    ];
-    hardware = {
-      opengl = {
-        driSupport32Bit = true;
-        #package = pkgs.mesa_drivers;
-        enable = true;
-      };
-      nvidia = {
-        prime = {
-          offload = { enable = true; };
-          intelBusId = "PCI:0:2:0";
-          nvidiaBusId = "PCI:1:0:0";
-        };
-        modesetting = { enable = true; };
-      };
-    };
-    services.xserver.videoDrivers = [ "nvidia" ];
-  }