refactor file structure

flake.nix

@@ -49,19 +49,19 @@
       freun-dev = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = { inherit inputs; };
-        modules = [ ./freun.dev ];
+        modules = [ ./hosts/freun.dev ];
       };
 
       radish = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = { inherit inputs; };
-        modules = [ ./radish ];
+        modules = [ ./hosts/radish ];
       };
 
       apu = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = { inherit inputs; };
-        modules = [ ./apu ];
+        modules = [ ./hosts/apu ];
       };
     };
   };