feat: handle timezones and conversions with NodaTime

Oqtane.Client/Services/TimeZoneService.cs

@@ -1,22 +0,0 @@
-using System.Collections.Generic;
-using System.Net.Http;
-using System.Threading.Tasks;
-using Oqtane.Documentation;
-using Oqtane.Models;
-using Oqtane.Shared;
-
-namespace Oqtane.Services
-{
-    [PrivateApi("Don't show in the documentation, as everything should use the Interface")]
-    public class TimeZoneService : ServiceBase, ITimeZoneService
-    {
-        public TimeZoneService(HttpClient http, SiteState siteState) : base(http, siteState) { }
-
-        private string Apiurl => CreateApiUrl("TimeZone");
-
-        public async Task<List<TimeZone>> GetTimeZonesAsync()
-        {
-            return await GetJsonAsync<List<TimeZone>>($"{Apiurl}");
-        }
-    }
-}