[feat] Add support for chat stickers

This commit adds support for chat stickers by allowing users to use stickers in chat message window.
The users can toggle show additional asset list using a button.
Added Additional assets file extension data.
Additional assets list shows preview.
Optimized render when use streaming api. (prevent markdown again when message not changed)
Added controls to Video/Audio Assets

src/lang/cn.ts

@@ -304,6 +304,7 @@ export const languageChinese = {
     tags: "标签",
     copied: "已复制",
     useChatCopy: "使用聊天复制",
+    useChatSticker: "使用聊天贴纸",
     autoTranslateInput: "使用自动翻译输入",
     enterMessageForTranslateToEnglish: "输入要翻译为英语的消息",
     recent: '最新',