add news/ranking pages

Pixiview/Resources/Languages/zh-CN.xml

@@ -2,6 +2,7 @@
 <root>
     <Title>Pixiview</Title>
     <Ok>OK</Ok>
+    <R18>R-18</R18>
     <Follow>已关注</Follow>
     <News>最新</News>
     <Ranking>排行榜</Ranking>

Pixiview/Resources/ResourceHelper.cs

@@ -12,6 +12,7 @@ namespace Pixiview.Resources
     {
         public static string Title => GetResource(nameof(Title));
         public static string Ok => GetResource(nameof(Ok));
+        public static string R18 => GetResource(nameof(R18));
         public static string SaveSuccess => GetResource(nameof(SaveSuccess));
 
         static readonly Dictionary<string, LanguageResource> dict = new Dictionary<string, LanguageResource>();