chore: faq on expanding/collapsing animations (#290)

Author: lukasbach

packages/docs/docs/faq.mdx

@@ -18,10 +18,14 @@ Feel free to contribute additional questions and answers if you think they are r
     updating items?</summary>
 <div>
 
-If you want to react to tree state changes, I suggest you implement a custom
-[TreeDataProvider](https://rct.lukasbach.com/docs/api/interfaces/TreeDataProvider)
-rather than using
-StaticTreeDataProvider. There you can implement logic that reacts to change events. If you need more
+If you want to react to tree state changes, the easiest way to go forward is implementing a custom
+[TreeDataProvider](https://rct.lukasbach.com/docs/api/interfaces/TreeDataProvider),
+though it is also possible with static tree data providers.
+
+[Here is some documentation on how to achieve this with static tree data providers](https://rct.lukasbach.com/docs/guides/static-data-provider),
+and [here is some documentation on how to do it with custom tree data providers](https://rct.lukasbach.com/docs/guides/custom-data-provider).
+
+There you can implement logic that reacts to change events. If you need more
 control, you can also use a [controlled environment](https://rct.lukasbach.com/docs/guides/controlled-environment)
 rather than an uncontrolled environment, then you get complete control over your data.
 
@@ -228,4 +232,14 @@ Reference: [#291](https://github.com/lukasbach/react-complex-tree/issues/291)
 
 </details>
 
+<details><summary>I want to animate expanding and collapsing subtrees</summary>
+
+The library doesn't provide that functionality out of the box, but you can implement it yourself with some custom
+logic. [Here is a sample implementation](https://github.com/lukasbach/react-complex-tree/blob/7e4e397d464755002d8d09aa106c678e6598a803/packages/core/src/stories/BasicExamples.stories.tsx#L579),
+and [this is the storybook where you can see how it looks like](https://rct.lukasbach.com/storybook/?path=/story/core-basic-examples--animated-expanding-and-collapsing).
+
+Reference: [#290](https://github.com/lukasbach/react-complex-tree/issues/290)
+
+</details>
+
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