feat: many changes

modules/core.nix

@@ -1,12 +1,14 @@
-{ den, ... }: {
-  den.aspects.core.nixos = { pkgs, ... }: {
+{ den, inputs, ... }: {
+  den.aspects.core.nixos = { pkgs, ... }:
+  let
+    pkgs-unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.system};
+  in {
     nixpkgs.config.allowUnfree = true;
 
     nix = {
       settings = {
         experimental-features = [ "nix-command" "flakes" ];
-        auto-optimise-store = true;
-        
+        auto-optimise-store = true;        
       };
       gc = {
         automatic = true;
@@ -15,17 +17,25 @@
       };
     };
 
+    zramSwap =  {
+      enable = true;
+      algorithm = "zstd";
+      memoryPercent = 300;
+    };
+
     services.xserver = {
       enable = false;
       xkb.layout = "en";
     };
 
     environment.systemPackages = with pkgs; [
-      curl 
-      wget 
-      neovim
+      curl
+      wget
+      pkgs-unstable.neovim
       btop
       nixd
+      unrar
+      p7zip
     ]; 
 
     networking.networkmanager.enable = true;