Minimal API responses.md: add missing IBindableFromHttpContext section

[wadepickett]

Fixes #32903

This was missed when it became available clear back in v7. (I did not own that at the time, but jumping in to fix it)

For versions 7-10 of the parameter-binding.md topic:

• Added new section:
  Custom parameter binding with IBindableFromHttpContext
• Added a new app sample plus test .http for it.

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aspnetcore/fundamentals/minimal-apis/parameter-binding.md	Parameter Binding in Minimal API apps

[mikekistler]

I haven't reviewed carefully, but I think at mininum the content needs to move to a different section. Let's work that out first and then flag me to re-review.

[mikekistler]

This topic is showing up in an article titled "Create responses", but it is about parameter binding. I think this is in the wrong place -- it should appear within the article with the title "Parameter binding".

[wadepickett]

Thanks @mikekistler, I moved the new section to the Parameter-binding.md topic, and updated the intro for Custom Binding to include it here: https://review.learn.microsoft.com/en-us/aspnet/core/fundamentals/minimal-apis/parameter-binding?view=aspnetcore-10.0&branch=pr-en-us-35999#custom-binding

[mikekistler]

Do we need 4 different sample apps and 4 separate include files for this? I don't think the feature has changed substantially since ASP.NET Core 7 so I think we only need one app and feature description.

Also I think that describing this as "for advanced scenarios" is a bit vague. I think the point of this interface is to avoid the need for reflection and therefore to allow the app to be AOT compatible. If that's correct, I think we should state that explicitly.