feat: add extra options to all systems

hosts/default.nix

@@ -7,15 +7,11 @@ in
     marr = lib.my.mkSystem {
       hostname = "marr";
       system = "x86_64-linux";
-      extraModules = [
-        #inputs.nixos-hardware.nixosModules.dell-xps-15-9510-nvidia
-      ];
     };
 
     brontes = lib.my.mkSystem {
       hostname = "brontes";
       system = "x86_64-linux";
-      extraModules = [ ];
     };
 
     styrak = lib.my.mkSystem {

options/default.nix

@@ -0,0 +1,7 @@
+{ lib, ... }:
+{
+  options.custom.pubKey = lib.mkOption {
+    type = lib.types.str;
+    default = "";
+  };
+}

parts/lib/functions.nix

@@ -25,6 +25,7 @@
       inherit system;
       modules = [
         "${self}/hosts/${hostname}/configuration.nix"
+        "${self}/options"
         { networking.hostName = hostname; }
       ] ++ extraModules;
       specialArgs = {