Add backup script

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/console/nix-develop/default.nix

@@ -7,23 +7,27 @@
   home-manager.users.${user}.programs.zsh = {
     shellAliases.nd = "nix-develop";
 
-    initExtra = let
-      devShells = lib.strings.concatStringsSep " " (lib.attrsets.mapAttrsToList (key: _: key) inputs.self.devShells);
-    in ''
-      nix-develop() {
-        if [ -z "$1" ]; then
-          echo "Usage: nix-develop <shell>"
-          return 1
-        fi
-        nix develop self#"$1" -c "$SHELL"
-      }
+    initExtra =
+      let
+        devShells = lib.strings.concatStringsSep " " (
+          lib.attrsets.mapAttrsToList (key: _: key) inputs.self.devShells
+        );
+      in
+      ''
+        nix-develop() {
+          if [ -z "$1" ]; then
+            echo "Usage: nix-develop <shell>"
+            return 1
+          fi
+          nix develop self#"$1" -c "$SHELL"
+        }
 
-      _nix-develop-completion() {
-        local shells=(${devShells})
-        compadd -- $shells
-      }
+        _nix-develop_completion() {
+          local shells=(${devShells})
+          compadd -- $shells
+        }
 
-      compdef _nix-develop-completion nix-develop
-    '';
+        compdef _nix-develop_completion nix-develop
+      '';
   };
 }