feat: ban message now shows the ban reason and time when unbanned

Signed-off-by: limited_dev <loginakkisativ@gmail.com>

ImageBoardServerApp/Util/TheManager.cs

@@ -106,4 +106,11 @@ public class TheManager
 
         return BitConverter.ToString(bytes).Replace("-", "").ToLower();
     }
+
+    public static DateTime ConvertToDateTime(long timestamp)
+    {
+        DateTime unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
+        DateTime date = unixEpoch.AddSeconds(timestamp);
+        return date;
+    }
 }