Remove EFCore.Design dependency from EFCore.Tools and EFCore.Tasks

[AndriySvyryd]

Drop net472 TFM from the tools

Fixes #37739

[Copilot]

Pull request overview

This PR removes the implicit Microsoft.EntityFrameworkCore.Design dependency from the Tools/Tasks NuGet packages and drops the net472 toolchain path, simplifying packaging and removing .NET Framework execution support for the EF tooling entrypoints.

Changes:

• Drop net472 targeting/output for the ef executable and remove the AppDomain-based executor path.
• Update dotnet-ef and PMC tools to no longer attempt to run net472 ef.exe, instead rejecting .NETFramework startup projects.
• Remove the Design “stub” project and stop packing lib/**/_._ placeholders from Tools/Tasks packages.

Reviewed changes

Copilot reviewed 10 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/stubs/EFCore.Design.csproj	Removes the stub project previously used to force a Design dependency.
src/ef/ef.csproj	Stops multi-targeting net472; now targets only $(NetMinimum).
src/ef/Commands/ProjectCommandBase.cs	Removes the AppDomainOperationExecutor creation path (was only for non-NET builds).
src/ef/AppDomainOperationExecutor.cs	Deletes the .NET Framework AppDomain-based executor implementation.
src/dotnet-ef/dotnet-ef.csproj	Stops packing net472 tool outputs into the dotnet-ef tool package.
src/dotnet-ef/RootCommand.cs	Throws for .NETFramework startup projects and updates minimum .NETCoreApp version check.
src/dotnet-ef/Properties/Resources.resx	Updates/waswo adds framework validation messages.
src/dotnet-ef/Properties/Resources.Designer.cs	Regenerates resource accessors for new/updated messages.
src/EFCore.Tools/tools/EntityFrameworkCore.psm1	Removes net472 ef.exe dispatch logic; now rejects .NETFramework startup projects.
src/EFCore.Tools/EFCore.Tools.csproj	Removes packing of lib/** and drops the Design stub reference; keeps ef as a build-only reference.
src/EFCore.Tasks/EFCore.Tasks.csproj	Removes the Design project reference for non-.NETFramework TFMs and stops packing lib/**.

Files not reviewed (1)

• src/dotnet-ef/Properties/Resources.Designer.cs: Language not supported

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 14 changed files in this pull request and generated 3 comments.

Files not reviewed (1)

• src/dotnet-ef/Properties/Resources.Designer.cs: Language not supported

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 14 changed files in this pull request and generated 1 comment.

Files not reviewed (1)

• src/dotnet-ef/Properties/Resources.Designer.cs: Language not supported

Comments suppressed due to low confidence (1)

src/ef/Commands/ProjectCommandBase.cs:88

• After removing the AppDomain executor path, this method always uses ReflectionOperationExecutor, and the file-level conditional using directives (System.Runtime.Loader / System.Configuration) are now unused. With warnings-as-errors enabled, this will fail compilation (CS8019) for both the NET and non-NET TFMs. Remove the unused using(s) (and the now-unnecessary #if/#else block) or reintroduce usage where required.

            return new ReflectionOperationExecutor(
                Assembly!.Value()!,
                StartupAssembly!.Value(),
                _designAssembly!.Value(),
                Project!.Value(),

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