Version 8 breaking changes

[RossCoeH]

I think it was a mistake not to include notes on the breaking changes added in preview 4,, because many will jump from version 7 to. Version 8 and not see notes on changes like Icommand, and notifyfor... In my case I jumped from preview 3 and it took ages to find why Ithe generators broke. It would have been better still if the generators reported that the old syntax had been depreciated, or the docs noted the changes.

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• ID: 9a5d0b5f-2f8b-c85d-a27a-300cdb524329
• Version Independent ID: 9a5d0b5f-2f8b-c85d-a27a-300cdb524329
• Content: MVVM source generators - .NET Community Toolkit
• Content Source: docs/mvvm/generators/Overview.md
• Product: dotnet-communitytoolkit
• GitHub Login: @Sergio0694
• Microsoft Alias: bramin