wire-desktop: Add versions.json to enable updateScript

pkgs/by-name/wi/wire-desktop/package.nix

···
 
   pname = "wire-desktop";
 
+  versions = builtins.fromJSON (builtins.readFile ./versions.json);
+
   version =
-    let
-      x86_64-darwin = "3.39.5211";
-    in
     {
-      inherit x86_64-darwin;
-      aarch64-darwin = x86_64-darwin;
-      x86_64-linux = "3.39.3653";
+      x86_64-darwin = versions.macos.version;
+      aarch64-darwin = versions.macos.version;
+      x86_64-linux = versions.linux.version;
     }
     .${system} or throwSystem;
 
   hash =
-    let
-      x86_64-darwin = "sha256-k6CIqHt67AFL70zdK0/91aQcpbb00OIggk5TF7y1IOY=";
-    in
     {
-      inherit x86_64-darwin;
-      aarch64-darwin = x86_64-darwin;
-      x86_64-linux = "sha256-BbY+7fGAWW5CR/z4GeoBl5aOewCRuWzQjpQX4x1rzls=";
+      x86_64-darwin = versions.macos.hash;
+      aarch64-darwin = versions.macos.hash;
+      x86_64-linux = versions.linux.hash;
     }
     .${system} or throwSystem;
 

pkgs/by-name/wi/wire-desktop/versions.json

···
+{
+  "linux": {
+    "version": "3.39.3653",
+    "hash": "sha256-BbY+7fGAWW5CR/z4GeoBl5aOewCRuWzQjpQX4x1rzls="
+  },
+  "macos": {
+    "version": "3.39.5211",
+    "hash": "sha256-k6CIqHt67AFL70zdK0/91aQcpbb00OIggk5TF7y1IOY="
+  }
+}