feat: Detect Vercel env

Author: Luca Forstner

packages/bundler-plugin-core/src/options-mapping.ts

@@ -39,6 +39,17 @@ export function normalizeUserOptions(userOptions: UserOptions) {
     _experiments: userOptions._experiments ?? {},
   };
 
+  if (
+    options.release.deploy === undefined &&
+    process.env["VERCEL"] &&
+    process.env["VERCEL_TARGET_ENV"]
+  ) {
+    options.release.deploy = {
+      env: `vercel-${process.env["VERCEL_TARGET_ENV"]}`,
+      url: process.env["VERCEL_URL"],
+    };
+  }
+
   return options;
 }