[Blazor] Register persistent component state services in AddBlazorWebView

[Copilot]

This PR adds registration of persistent component state services to the AddBlazorWebView extension method, enabling persistent component state functionality in Blazor WebView applications.

Changes Made

• Added ComponentStatePersistenceManager service registration as scoped
• Added PersistentComponentState service registration as scoped with factory that retrieves the State property from the manager
• Added necessary using statement for Microsoft.AspNetCore.Components.Infrastructure
• Added comprehensive unit tests to verify services are registered correctly with proper lifetime scope

Problem

Previously, Blazor WebView applications couldn't use persistent component state because the required services (ComponentStatePersistenceManager and PersistentComponentState) were not registered in the service collection. Components that tried to inject PersistentComponentState would fail at runtime.

Solution

The fix follows the same pattern used in RazorComponentsServiceCollectionExtensions.AddRazorComponents:

services.TryAddScoped<ComponentStatePersistenceManager>();
services.TryAddScoped<PersistentComponentState>(sp => sp.GetRequiredService<ComponentStatePersistenceManager>().State);

This enables Blazor WebView applications to use persistent component state just like server-side and WebAssembly applications.

Testing

Added unit tests that verify:

• Services are registered and can be resolved from the service provider
• Services are registered with the correct scoped lifetime
• The PersistentComponentState service correctly returns the State property from the manager

Fixes #62383.

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[javiercn]

Adds the required registrations so that WebView based apps don't fail when a component contains [PersistentComponentState]

[javiercn]

@copilot rebase this PR against main

[Copilot]

@copilot rebase this PR against main

Done! Successfully rebased the PR against main. The branch is now up to date with the latest changes from the main branch. (c4f6ea3)