Same for es-callout
![image](https://github.com/user-attachments/assets/760c5175-1fa6-494f-a51d-16f91cb284d3)
![image](https://github.com/user-attachments/assets/c13ccfce-2042-45fe-afaa-ac80d17d0...
I suggest we moving the 'You are reading...' notice into the sidebar to free up reading space and reduce distraction
An example of this is the [mozilla doc page](https://developer.mozilla.org/en-U...
The first example might fail specifically when `{}` is included in the union type being processed
```ts
Expect<Equal<UnionToObjectFromKey<Foo | {}, 'foo'>, Foo>>,
```
[Playground](https://w...
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