Request to expose useGetLineProps, useGetTokenProps, useThemeDictionary

[dentrado]

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Feature Request

Hi! It would be great if you could expose:
- `useGetLineProps()`
- `useGetTokenProps()`
- `useThemeDictionary()`

Previously you exposed `useTokenize` which is great!(https://github.com/FormidableLabs/prism-react-renderer/issues/236) 
But to render those tokens in my own component it would help a lot if
I could still use `getLineProps` and `getTokenProps`, which it
seems like I should be able to do if the above three hooks were exposed.

[Georgegriff]

I agree, this would be a great addition, currently in order to access things like lineCount ahead of time you have to organize your whole code around the <Highlight> component or call useTokenize separately just for that, it's a little awkward

[carbonrobot]

@dentrado @Georgegriff Could you describe your use case for us? I'm trying to understand how your using it without the Highlight component. We can certainly expose these internal hooks, but I want to be sure it will actually solve your use cases.