Split the Routing & Navigation article

[guardrex]

Fixes #35683

Splits roughly along Router component and NavLink/NavigationManager lines.

Not Found spans them, so there's a little bit on the NotFoundPage param in the Routing article with the rest in the Not Found responses section of the new Navigation article.

I'm not planning a review/update of all sections at this time. It would slow me down by a couple of days in reaching the next Blazorfy IT!™ issue, but let me know if you would like to go for a full review on all of this guidance.

I'm inlining code examples because it's taking an awful lot of time ... i.e., 💰💰💰 ... to update sample cross-links every release for no great benefit. The code isn't changing and isn't likely to change for these examples. I'm stripping off the <PageTitle> markup because it came in at 6.0, making the examples apply universally.

Outlines

Routing article

• Introductory remarks
• Static versus interactive routing
• ASP.NET Core endpoint routing integration
• Route templates
• Focus an element on navigation
• Provide custom content when content isn't found
• Route to components from multiple assemblies
  • Static routing
  • Interactive routing
• Route parameters
• Route constraints
• Avoid file capture in a route parameter
• Routing with URLs that contain dots
• Handle asynchronous navigation events with OnNavigateAsync
• Handle cancellations in OnNavigateAsync
• User interaction with <Navigating> content

Navigation article

• Introductory remarks
• NavLink component
• URI and navigation state helpers
• Location changes
• Navigation Manager redirect behavior during static server-side rendering (static SSR)
• Not Found responses
• Enhanced navigation and form handling
• Produce a URI relative to the base URI prefix
• Navigation history state
• Navigation options
• Query strings
  • Replace a query parameter value when the parameter exists
  • Append a query parameter and value when the parameter doesn't exist
  • Remove a query parameter when the parameter value is null
  • Add, update, and remove query parameters
  • Support for enumerable values
  • Navigate with an added or modified query string
• Hashed routing to named elements
• Handle/prevent location changes
• Dynamically-generated NavLink components via reflection

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aspnetcore/blazor/call-web-api.md	aspnetcore/blazor/call-web-api
aspnetcore/blazor/components/built-in-components.md	aspnetcore/blazor/components/built-in-components
aspnetcore/blazor/components/index.md	aspnetcore/blazor/components/index
aspnetcore/blazor/components/render-modes.md	aspnetcore/blazor/components/render-modes
aspnetcore/blazor/components/rendering.md	aspnetcore/blazor/components/rendering
aspnetcore/blazor/forms/index.md	aspnetcore/blazor/forms/index
aspnetcore/blazor/fundamentals/dependency-injection.md	aspnetcore/blazor/fundamentals/dependency-injection
aspnetcore/blazor/fundamentals/navigation.md	aspnetcore/blazor/fundamentals/navigation
aspnetcore/blazor/fundamentals/routing.md	aspnetcore/blazor/fundamentals/routing
aspnetcore/blazor/fundamentals/startup.md	aspnetcore/blazor/fundamentals/startup
aspnetcore/blazor/fundamentals/static-files.md	aspnetcore/blazor/fundamentals/static-files
aspnetcore/blazor/host-and-deploy/app-base-path.md	aspnetcore/blazor/host-and-deploy/app-base-path
aspnetcore/blazor/javascript-interoperability/location-of-javascript.md	aspnetcore/blazor/javascript-interoperability/location-of-javascript
aspnetcore/blazor/javascript-interoperability/static-server-rendering.md	aspnetcore/blazor/javascript-interoperability/static-server-rendering
aspnetcore/blazor/project-structure.md	aspnetcore/blazor/project-structure
aspnetcore/blazor/security/index.md	aspnetcore/blazor/security/index
aspnetcore/blazor/security/webassembly/index.md	aspnetcore/blazor/security/webassembly/index
aspnetcore/blazor/state-management/prerendered-state-persistence.md	aspnetcore/blazor/state-management/prerendered-state-persistence
aspnetcore/blazor/state-management/server.md	aspnetcore/blazor/state-management/server
aspnetcore/blazor/tutorials/movie-database-app/part-3.md	aspnetcore/blazor/tutorials/movie-database-app/part-3
aspnetcore/fundamentals/index.md	aspnetcore/fundamentals/index
aspnetcore/fundamentals/routing.md	aspnetcore/fundamentals/routing
aspnetcore/migration/60-70.md	aspnetcore/migration/60-70
aspnetcore/release-notes/aspnetcore-6.0.md	aspnetcore/release-notes/aspnetcore-6.0
aspnetcore/release-notes/aspnetcore-8.0.md	aspnetcore/release-notes/aspnetcore-8.0
aspnetcore/security/authentication/passkeys/blazor.md	aspnetcore/security/authentication/passkeys/blazor
aspnetcore/toc.yml	aspnetcore/toc