docs: update the main readme

Author: phonzammi

README.md

@@ -4,6 +4,9 @@
   - Docs: [vike.dev/vike-solid](https://vike.dev/vike-solid)
   - Version history: [CHANGELOG.md](packages/vike-solid/CHANGELOG.md)
   - Source code: [packages/vike-solid/](packages/vike-solid)
-
+- `vike-solid-query` ([TanStack Query](https://tanstack.com/query) integration)
+  - Docs: [README.md](packages/vike-solid-query/README.md)
+  - Version history: [CHANGELOG.md](packages/vike-solid-query/CHANGELOG.md)
+  - Source code: [packages/vike-solid-query/](packages/vike-solid-query)
 > [!NOTE]
 > The source code is [small, simple, and highly polished](https://vike.dev/vike-solid#under-the-hood). Contributing is easy and welcome, see [CONTRIBUTING.md](CONTRIBUTING.md) to get started.