add backup extension for home-manager

configuration.nix

@@ -14,6 +14,7 @@
     users = {
       smayzy = import ./home.nix;
     };
+    backupFileExtension = "backup";
   };
 
   system.stateVersion = "24.11";
@@ -135,6 +136,17 @@
   libreoffice-qt6-still
   hunspellDicts.fr-any
   base16-schemes
+  tor
+  wireshark
+  tshark
+  komikku
+  librewolf
+  freecad-wayland
+  aegisub
+  blender
+  inkscape
+  audacity
+  mpv
   ];
 
   stylix.enable = true;
@@ -153,6 +165,8 @@
       "com.heroicgameslauncher.hgl"
       "com.github.tchx84.Flatseal"
       "com.obsproject.Studio"
+      "com.usebottles.bottles"
+      "it.mijorus.gearlever"
     ];
   };