Feature: on Go 1.22, fill `(*http.Request).PathValue` with URLParam data

[AlexVasiluta]

Hey y'all!
For Go 1.22, this enhanced ServeMux routing proposal was accepted and pushed into the main tree, and *http.Request has some new methods, SetPathValue and PathValue. I think r.PathValue(...) could act as an alias for chi.URLParam(r, ...) when routing with chi.

There would probably need to be some logic with //go:build go1.22 that runs SetPathValue when inserting keys/values into chi.Context.URLParams for the corresponding http.Request. I have not dug deeper into chi's source code, but I think this would be a welcome addition for when Go 1.22 is released.

[pkieltyka]

most definitely will add support for the r.PathValue(..)

[angelofallars]

I just opened pull request #901 for this

[ptman]

@angelofallars that seems to be an urelated PR, maybe #901 instead?

[angelofallars]

@ptman Whoops, tagged the wrong PR. Thanks for pointing that out

[ptman]

BTW, it is sometimes handy that you can get the url param from the context instead of from the request. So thanks for keeping chi.URLParamFromCtx while still supporting r.PathValue!