docs(useStore): add react reference docs (#17)

* docs(useStore): add react docs

This PR add the useStore react hook reference docs and explains the hook API.

* simplify usestore docs

---------

Co-authored-by: Vikas <vkumar3@snapchat.com>

docs/framework/react/reference/useStore.md

@@ -2,5 +2,27 @@
 title: Use Store
 id: useStore
 ---
+### `useStore`
+
+```tsx
+export function useStore<
+  TState,
+  TSelected = NoInfer<TState>,
+  TUpdater extends AnyUpdater = AnyUpdater,
+>(
+  store: Store<TState, TUpdater>,
+  selector: (state: NoInfer<TState>) => TSelected = (d) => d as any,
+)
+```
+
+useStore is a custom hook that returns the updated store given the intial store and the selector. React can use this to keep your component subscribed to the store and re-render it on changes.
+
+
+
+#### Parameters
+- `store: Store<TState, TUpdater>`
+  - This parameter represents the external store itself which holds the entire state of your application. It expects an instance of a `@tanstack/store` that manages state and supports updates through a callback.
+- `selector: (state: NoInfer<TState>) => TSelected = (d) => d as any`
+  - This parameter is a callback function that takes the state of the store and expects you to return a sub-state of the store. This selected sub-state is subsequently utilized as the state displayed by the useStore hook. It triggers a re-render of the component only when there are changes in this data, ensuring that updates to the displayed state trigger the necessary re-renders
+
 
-Please see [/packages/react-store/src/index.tsx](https://github.com/tanstack/store/tree/main/packages/react-store/src/index.tsx)