Include resolved tool version in invalid DotnetToolSettings install/update errors

[Copilot]

dotnet tool install/update could surface DotnetToolSettings.xml errors without indicating which package version was actually resolved, making tool-author diagnosis harder when version selection/ranges were involved. This updates the error path to include concrete package identity details.

• Error payload now includes resolved package identity

  • MissingToolSettingsFile now formats with package id + resolved version.
  • Message changed from a generic package-level error to:
    • Settings file 'DotnetToolSettings.xml' was not found in package '{id}@{version}'.

• Version propagation at throw site

  • In ToolPackageInstance, the missing-settings exception now uses the resolved library.Version (the concrete selected version), not just package id context.
  • Added a small helper to centralize formatting for this specific error path.

• Focused unit coverage

  • Added ToolPackageInstanceTests to assert the missing-settings message includes package identity in <package>@<version> form.

throw new ToolConfigurationException(
    GetMissingToolSettingsFileMessage(packageId, library.Version));

internal static string GetMissingToolSettingsFileMessage(PackageId packageId, NuGetVersion packageVersion)
    => string.Format(CliStrings.MissingToolSettingsFile, packageId, packageVersion.ToNormalizedString());

[Copilot]

Pull request overview

Updates the dotnet tool install/update error surfaced when DotnetToolSettings.xml is missing so it includes the resolved package identity (ID + concrete version), improving diagnosability when version ranges/floating resolution are involved.

Changes:

• Update MissingToolSettingsFile to include package ID and resolved version.
• Propagate the resolved library.Version into the thrown ToolConfigurationException via a small helper.
• Add a unit test asserting the error message includes both package name and version.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
test/Microsoft.DotNet.PackageInstall.Tests/ToolPackageInstanceTests.cs	Adds coverage for the new error message formatting (ID + version).
src/Cli/dotnet/ToolPackage/ToolPackageInstance.cs	Uses resolved library.Version and centralizes formatting in a helper method.
src/Cli/dotnet/CliStrings.resx	Updates the localized string template to include {0} (id) and {1} (version).

[baronfel]

/ba-g unrelated flaky test failure in static web assets