allow plugin to work in rolldown

rolldown does not expose importedIdResolutions similar to rollup and so we need
to manually get it from importedIds and this.getModuleInfo

Author: radnan

.changeset/light-guests-pull.md

@@ -0,0 +1,5 @@
+---
+'@vanilla-extract/rollup-plugin': patch
+---
+
+allow plugin to work in rolldown

packages/rollup-plugin/src/index.ts

@@ -74,8 +74,9 @@ export function vanillaExtractPlugin({
     },
     // Emit .css assets
     moduleParsed(moduleInfo) {
-      moduleInfo.importedIdResolutions.forEach((resolution) => {
-        if (resolution.meta.css) {
+      moduleInfo.importedIds.forEach((id) => {
+        const resolution = this.getModuleInfo(id);
+        if (resolution?.meta.css) {
           resolution.meta.assetId = this.emitFile({
             type: 'asset',
             name: resolution.id,