Update Design-time services

[AndriySvyryd]

See https://github.com/dotnet/efcore/blob/main/src/EFCore.Design/Design/DesignTimeServiceCollectionExtensions.cs

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Document Details

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• ID: 2886eabf-4b28-c390-9634-14e623e8ec8e
• Version Independent ID: 1ef0f90d-664c-81f7-ee5d-f67dafce4ed1
• Content: Design-time services - EF Core
• Content Source: entity-framework/core/cli/services.md
• Product: entity-framework
• Technology: entity-framework-core
• GitHub Login: @bricelam
• Microsoft Alias: avickers

[roji]

Out of curiosity, is there a reason we need to list the design-time services? We don't seem to list the non-design-time services anywhere, and I'm not sure why users need this...

[bricelam]

Listed here mostly to let users know they exist as extensibility points and can be reused to create custom design-time tools. (More do this than you’d expect.)

[bricelam]

I also think these are different than runtime services since there isn’t exactly a public API for them that enables the common scenarios

[AndriySvyryd]

Also document how to override CSharpHelper.ShouldUseFullName, see https://github.com/dotnet/efcore/pull/25605/files

[AndriySvyryd]

See #4013 and dotnet/efcore#34454 (comment)