Blazor Hybrid link handling behaviors

[guardrex]

Fixes #25432

Internal Review Topic

• There were commits and additional discussion after your remarks at Improved non-HTTP(S) link handling behavior maui#5313 (comment) on the PU PR, and I don't know if your remarks were updated for those followup commits/new design.
• Also, the remarks and discussion are kind'a cryptic in a few spots, such as for permutations for any scheme-based behaviors, static files in the app, and platform/OS behaviors.
• I recommend that you edit the PR directly to get the technical remarks right, then I'll circle around and sprinkle in a few commas and what-nots. You can see where I'm going with this: I suggest laying out the default behaviors first, then describing the dev control that can be taken for URL loading. I feel much more confident in the text/examples for the latter than I do for the initial default behavior section at the top of the doc.
• Also note that I hit a little confusion over the use of URL vs. URI in these contexts, so you'll want to assess that as part of the review to see if/where things went wrong.
• I recommend structuring the bullet list under the line "Default URI request routing behavior:" to match (roughly, at least) the order of applied behaviors, if possible. 🤔 I think it makes sense because routing behaviors may change depending on the processing sequence that the framework follows.