Adding docs on using tokio task_local to share state

[Gaelik-git]

I stumbled upon this discussion for using tokio task_local to share state between handlers and middleware.

Is it okay to add some docs, would you prefer to have some test or example to show the behaviour ?

[jplatte]

Thanks for the PR! I think it makes sense to showcase this in the docs, but in addition to the small improvement suggestions below, there are two more general things:

• I think this documentation belongs in the main documentation, in the "Sharing state with handlers" section
• To me, the real important aspect about this is that unlike other state sharing mechanisms, this one actually also works to share state with IntoResponse impls; I think the docs should call this out

[jplatte]

Hey @Gaelik-git, are you still interested in getting back to this?

[Gaelik-git]

Yep sorry for the late response, I moved and modified the example for it to include the IntoReponse implementation
But my example does not make much sense though, devs will still get the point I think but if you have other suggestion do not hesitate

[jplatte]

Thanks again!

[Gaelik-git]

glad I could contribute