fixing imports and ssr support + updated remix/nextjs/astro examples

app/src/ui/index.ts

@@ -1,14 +1,4 @@
 export { default as Admin, type BkndAdminProps } from "./Admin";
-export { Button } from "./components/buttons/Button";
-export { Context } from "./components/Context";
-export {
-   useClient,
-   ClientProvider,
-   BkndProvider,
-   useBknd,
-   useAuth,
-   useBaseUrl
-} from "./client";
 export {
    EntitiesContainer,
    useEntities,