Document .NET 11 NU1703 warning for deprecated MonoAndroid package assets

[Copilot]

NuGet restore now emits NU1703 for Android projects that target .NET 11+ when package restore selects deprecated MonoAndroid assets, with behavior gated by SdkAnalysisLevel >= 11.0.100. This PR adds the .NET 11 breaking-change documentation and links it from the relevant compatibility and SDK guidance surfaces.

• Breaking change article

  • Added docs/core/compatibility/sdk/11/nu1703-deprecated-monoandroid-framework.md.
  • Captures previous vs. new behavior, reason for change, recommended actions, and compatibility impact.

• .NET 11 compatibility index

  • Updated docs/core/compatibility/11.md under SDK and MSBuild with a new NU1703 entry (Source incompatible).

• Compatibility TOC

  • Updated docs/core/compatibility/toc.yml to include the new NU1703 article under .NET 11 > SDK and MSBuild.

• Related SDK guidance

  • Updated docs/core/project-sdk/msbuild-props.md (SdkAnalysisLevel table) to point the NU1703 behavior to the new breaking-change article.

Package 'PackageName' 1.0.0 uses the deprecated MonoAndroid framework instead of 'net6.0-android' or later. Consider upgrading to a newer version of this package or contacting the package author.

---

Internal previews

📄 File	🔗 Preview link
docs/core/compatibility/11.md	Breaking changes in .NET 11
docs/core/compatibility/sdk/11/nu1703-deprecated-monoandroid-framework.md	NU1703 warning for packages that use deprecated MonoAndroid framework assets
docs/core/compatibility/toc.yml	docs/core/compatibility/toc

[Copilot]

Pull request overview

Documents a new .NET 11 breaking change: NuGet restore emits NU1703 when Android projects targeting .NET 11+ (with SdkAnalysisLevel >= 11.0.100) resolve deprecated MonoAndroid package assets. The new article is wired into the .NET 11 compatibility index, the compatibility TOC, and referenced from the SdkAnalysisLevel table in the SDK project properties doc.

Changes:

• New breaking-change article describing previous/new behavior, reason, recommended action, and opt-out via SdkAnalysisLevel.
• TOC and .NET 11 compatibility index entries added for the new article.
• msbuild-props.md updated so the NU1703 row links to the new article instead of the generic NuGet error reference.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
docs/core/compatibility/sdk/11/nu1703-deprecated-monoandroid-framework.md	New breaking-change article for NU1703 MonoAndroid deprecation.
docs/core/compatibility/11.md	Adds NU1703 entry to SDK and MSBuild table.
docs/core/compatibility/toc.yml	Adds TOC entry under .NET 11 > SDK and MSBuild.
docs/core/project-sdk/msbuild-props.md	Redirects NU1703 link in SdkAnalysisLevel table to the new article.

[wadepickett]

Looks good overall. Approved. See my inline note on the line breaks. (minor item)

[adegeo]

No request changes for you!