Remove Tizen from templates (+ tests) for .NET 10

[jfversluis]

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Description of Change

Removes the Tizen specific instructions and nodes from the MAUI templates and related integrations tests.

[Copilot]

Pull Request Overview

This PR removes Tizen-specific support from the .NET MAUI templates and associated integrations tests for the .NET 10 release. The key changes include:

• Removal of Tizen build targets, conditions, and supported OS versions from the various .csproj files.
• Updates to template configurations and localized template strings to exclude any Tizen references.
• Deletion of Tizen-specific source files and manifest files from the library and Blazor solution projects.

Reviewed Changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Templates/src/templates/maui-mobile/MauiApp.1.csproj	Removed commented-out Tizen target frameworks and the Tizen SupportedOSPlatformVersion element.
src/Templates/src/templates/maui-mobile/.template.config/template.json	Tizen removed from classifications and project description.
src/Templates/src/templates/maui-mobile/.template.config/localize/templatestrings.json	Tizen removed from the description.
src/Templates/src/templates/maui-lib/Platforms/Tizen/PlatformClass1.cs	Deleted the entire Tizen-specific file.
src/Templates/src/templates/maui-lib/MauiLib1.csproj	Removed Tizen targets and version conditions.
src/Templates/src/templates/maui-lib/.template.config/template.json	Removed Tizen from the classifications.
Other template config files	Similar removal of Tizen from classifications and descriptions.
Tizen-specific files in Blazor and BlazorSolution projects	Full removal of Tizen manifests, source code, and project targets.
Directory.Build.props	Removed Tizen from the DefaultPackageTags.

Comments suppressed due to low confidence (2)

src/Templates/src/templates/maui-blazor/MauiApp.1.csproj:39

• Please ensure that any Tizen-specific tests in TestCases.HostApp and TestCases.Shared.Tests have also been removed or updated to reflect the removal of Tizen support.

<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>

Directory.Build.props:38

• [nitpick] Verify that the removal of Tizen from the default package tags is also updated in the related documentation to avoid any inconsistencies for package consumers.

<DefaultPackageTags>dotnet-maui;dotnet;maui;cross-platform;ios;android;macos;maccatalyst;windows;winui</DefaultPackageTags>