chore: fixes monorepo dev plugin-import-export (#12528)

Author: DanRibbens

tsconfig.base.json

@@ -57,6 +57,9 @@
       "@payloadcms/plugin-form-builder/client": [
         "./packages/plugin-form-builder/src/exports/client.ts"
       ],
+      "@payloadcms/plugin-import-export/rsc": [
+        "./packages/plugin-import-export/src/exports/rsc.ts"
+      ],
       "@payloadcms/plugin-multi-tenant/rsc": ["./packages/plugin-multi-tenant/src/exports/rsc.ts"],
       "@payloadcms/plugin-multi-tenant/utilities": [
         "./packages/plugin-multi-tenant/src/exports/utilities.ts"