moved gaming configuration to /sys module, added a bunch of neovim plugins

modules/sys/software/gaming/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+	imports = 
+	[(import ./steam.nix)]
+	++ [(import ./gaming_pkgs.nix)];
+}

modules/sys/software/gaming/gaming_pkgs.nix

@@ -0,0 +1,7 @@
+{ pkgs, ... }:
+
+{
+	environment.systemPackages = with pkgs; [
+		snes9x-gtk
+	];
+}

modules/sys/software/gaming/steam.nix

@@ -0,0 +1,6 @@
+{...}: {
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true;
+  };
+}