Pass host to onInjection Hook + Add docs

[iMostfa]

Hello, in This PR i add documentation for the small feature introduced in

91

where it describes when it might be useful, with an example, thanks for the great project <3

[krzysztofzablocki]

@iMostfa you are not really passing any argument to the hook so I don't think that works this way? also you might want to change the prototype to pass in the host so you don't need to cast in the closure itself ?

[iMostfa]

@krzysztofzablocki oh, my previous example wasn't the best, in the example i was capturing the presenter fromself/the world of caller

• i updated the hook to pass the host
• i updated the comment in the code

[krzysztofzablocki]

🙇