NuGet-reference updates and refactorings.

Breaking changes:

• LocalizationProvider made obsolete, use DynamicCacheLocalizationProvider or StaticCacheLocalizationProvider instead
• ResourceProvider made obsolete, use DynamicCacheResourceProvider or StaticCacheResourceProvider instead
• NuGet-reference updates

NuGet-reference updates

Microsoft.Extensions.Localization: NuGet-reference update

Updated from 2.2.0 to 6.0.1. Breaking changes:

• Microsoft.Extensions.Localization.IStringLocalizer.WithCulture(CultureInfo culture) removed

Obsolete already in version 3:

• https://docs.microsoft.com/en-us/dotnet/api/microsoft.extensions.localization.istringlocalizer.withculture?view=dotnet-plat-ext-3.1

Solution restructure

Made logging-extensions obsolete. Using logging-extensions from the NuGet-package "RegionOrebroLan.Logging" instead.

Localization service-registration fix.

Initial release.