Switch from EmojiOne to Twemoji, different emoji picker (#5046)

* Switch from EmojiOne to Twemoji, different emoji picker

* Make emoji-mart use a local spritesheet

* Fix emojify test

* yarn manage:translations

app/javascript/mastodon/locales/zh-TW.json

@@ -67,13 +67,17 @@
   "embed.instructions": "要內嵌此貼文，請將以下代碼貼進你的網站。",
   "embed.preview": "看上去會變成這樣：",
   "emoji_button.activity": "活動",
+  "emoji_button.custom": "Custom",
   "emoji_button.flags": "旗幟",
   "emoji_button.food": "食物與飲料",
   "emoji_button.label": "插入表情符號",
   "emoji_button.nature": "自然",
+  "emoji_button.not_found": "No emojos!! (╯°□°）╯︵ ┻━┻",
   "emoji_button.objects": "物件",
   "emoji_button.people": "人",
+  "emoji_button.recent": "Frequently used",
   "emoji_button.search": "搜尋…",
+  "emoji_button.search_results": "Search results",
   "emoji_button.symbols": "符號",
   "emoji_button.travel": "旅遊與地點",
   "empty_column.community": "本地時間軸是空的。公開寫點什麼吧！",