adding 'dotnet-scaffold blazor-crud' command

blazor-crud command:

Added Blazor/BlazorCrud/BlazorCrudCommand.cs
- similar to other EF based dotnet-scaffold-aspnet commands
- abstracted out DbContext and Model property initialization to Common\ClassAnalyzers
- abstracted out DbContext related CodeModifierConfig changes to AspNetDbContextHelper.AddDbContextChanges
Added BlazorCrudAppProperties.cs
- contains properties regarding the 'Interactivity' type and location of the given blazor app.
- initialized in BlazorCrudHelper.GetBlazorPropertiesAsync
- used to add CodeSnippets for modifying Program.cs
Added BlazorCrudHelper.cs and blazorWebCrudChanges.json
Added all Blazor CRUD templates at dotnet-scaffold-aspnet\Templates\BlazorCrud MinimalApiCommand minor changes:
applied aforementioned changes to include Common\ClassAnalyzers.cs changes Model class changes:
abstracted out all DbContext related info to Common\DbContextInfo class, used in MinimalApiModel and BlazorCrudModel for now.
abstracted out all Model related info to Common\ModelInfo class, used in appropriate models. smaller misc. changes :
Added Microsoft.DotNet.Scaffolding.Helpers.Roslyn.RoslynUtilities
- copied over from Microsoft.DotNet.Scaffolding.Shared, will carry over the unit tests later.
minor changes to MinimalApi.tt and MinimalApiEf.tt templates

dotnet / Scaffolding