Fixes #34587
Fixes #14974

NoTeS

• Includes trying to close the issue you, Javier, opened for the SignalR doc set.
• Not sure on the placement of the SignalR article. Did you prefer just a section? Where do you want the article in the ToC, or where do you want the section if I take that content and make it into a section? IMO, Blazor should have this guidance surfaced better than a section. Pop open the whole Blazor article on the DIFF to review the entire Blazor article. This gets rid of the INCLUDE that I was using before that was burying this content ... devs aren't always finding it as a section.
• I'd like to keep the "advanced" cross-links. Dev are asking for more details, and the convos in those issues explain quite a bit, especially the discussion that you, Mackinnion, Steve, and I had on this subject. I hope we can keep it with the lingo that I placed, explaining that it's for "advanced" scenarios and that most devs won't need to look at it. However, I'm ready to 🔪 those cross-links if you want ... I'm just concerned that even more issues will come in if we do.

Internal previews