Bug 38993: (follow-up) Add 'fetch' alias to rspack config

Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>

rspack.config.js

@@ -4,6 +4,14 @@ const path = require("path");
 const rspack = require("@rspack/core");
 
 module.exports = {
+    resolve: {
+        alias: {
+            "@fetch": path.resolve(
+                __dirname,
+                "koha-tmpl/intranet-tmpl/prog/js/fetch"
+            ),
+        },
+    },
     experiments: {
         css: true,
     },