feat: run prettier on env declaration file at end

src/generateEnv.ts

@@ -33,6 +33,10 @@ envFile.getInterfaceOrThrow("Env").addProperties(
 
 await project.save();
 
+await logStep("Formatting env.d.ts", "Formatted env.d.ts", () =>
+  $`bunx prettier --write src/types/env.d.ts`.quiet(),
+);
+
 async function logStep<T = void>(
   inProgressText: string,
   doneText: string,