Update dotnet monorepo to v7 (major)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
Microsoft.AspNetCore.Components.WebAssembly (source)	nuget	major	6.0.11 -> 7.0.0
Microsoft.AspNetCore.Components.WebAssembly.DevServer (source)	nuget	major	6.0.11 -> 7.0.0
Microsoft.EntityFrameworkCore.Cosmos (source)	nuget	major	6.0.11 -> 7.0.0
Microsoft.Extensions.Configuration (source)	nuget	major	6.0.1 -> 7.0.0
Microsoft.Extensions.Configuration.CommandLine (source)	nuget	major	6.0.0 -> 7.0.0
Microsoft.Extensions.Configuration.EnvironmentVariables (source)	nuget	major	6.0.1 -> 7.0.0
Microsoft.Extensions.Configuration.Json (source)	nuget	major	6.0.0 -> 7.0.0
Microsoft.Extensions.DependencyInjection (source)	nuget	major	6.0.1 -> 7.0.0
Microsoft.Extensions.Http (source)	nuget	major	6.0.0 -> 7.0.0
System.Net.Http.Json (source)	nuget	major	6.0.0 -> 7.0.0

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