[Nox.Solution] Localization Validations

[rochar]

Add the following validations to Localization in Nox Solution:

1. All are valid Culture Codes, use CultureCode.From()
2. On Apply defaults ensure (add to list if not) that supported SupportedCultures contains also DefaultCulture
3. On Apply defaults Create a Collection of SupportedCultures of Type CultureCode
4. Update IHttpLanguage to return CultureCode

public class Localization
{
    [Title("The list of culture codes supported by the solution.")]
    [Description("The list of culture codes that the solution supports.")]
    [Pattern(@"^[a-z]{2}-[A-Z]{2}$")]
    [Required]
    public IReadOnlyList<string> SupportedCultures { get; set; } = new List<string>() { "en-US" };

    [Title("The default culture code for the solution.")]
    [Description("The default culture code used for formatting and translation.")]
    [Pattern(@"^[a-z]{2}-[A-Z]{2}$")]
    [Required]
    public string DefaultCulture { get; set; } = "en-US";
}

[gjorgji-grgovski-authoritypartners]

https://regusit.atlassian.net/browse/MP-9739