Updateted to .NET 8.0, NuGet Packages updated

[aminmesbahi]

Issues with .NET 8.0 Fixed
NuGet Packages Updated

[what-the-diff]

PR Summary

• Updated package versions in Directory.Packages.props
  The versions of some packages were updated. They include Meziantou.Analyzer, Microsoft.VisualStudio.Threading.Analyzers, SonarAnalyzer.CSharp, Roslynator.Analyzers, and Microsoft.EntityFrameworkCore.Analyzers. Updates like this usually mean increased functionality, enhanced security, or improved performance.

• Updated sdk.version in global.json
  The sdk.version was updated from 7.0.306 to 8.0. This update typically offers new features and improvements from the .NET platform.

• Changed package versions in Directory.Packages.props
  The version of certain packages related to EntityFrameworkCore and Microsoft.AspNetCore.Identity were updated from 7.0.x to 8.0.2. Such updates usually bring with themselves better features, enhanced security, and performance boost.

• Target framework updated in multiple project files
  The target framework for several projects files was updated from .NET 7.0 to .NET 8.0. This change enables the usage of new features and improvements released in .NET 8.0.

• Refactoring in the ServerInfo.cs file
  The GetWwwRootPath method was restructured to utilize a new private static variable, which helps increase the code's readability and maintainability.

• Code optimization in CustomNormalizer.cs and CustomSecurityStampValidator.cs files
  In CustomNormalizer.cs, a minor change was made to replace a string with a character, which is generally more efficient. In CustomSecurityStampValidator.cs, utilization of the ISystemClock parameter was replaced with a call to TimeProvider.GetUtcNow(), simplifying the code complexity and making the code more readable.

• Refactoring in the DbLogger.cs file
  There's an optimization change where JsonSerializerOptions object is created once as a static variable, JsonSerializerOptions, as opposed to creating it multiple times. This improves performance by reducing the number of object creations.

[VahidN]

Thank you.