絵文字ピッカーの Unicode 12.0 対応など (#5441)

* Twemoji 12.1

* 絵文字ライブラリを持つように

* Fix chess_pawn emoji

* Add Unicode 12.0 emojis

* Add transgender flag/symbol emoji

* Add some japanese emoji keywords

* format emojilist.json

* fix emojilist order

* Add missing flags

src/misc/emojilist.ts

@@ -0,0 +1,7 @@
+// initial converted from https://github.com/muan/emojilib/commit/242fe68be86ed6536843b83f7e32f376468b38fb
+export const emojilist = require('../emojilist.json') as {
+	name: string;
+	keywords: string[];
+	char: string;
+	category: 'people' | 'animals_and_nature' | 'food_and_drink' | 'activity' | 'travel_and_places' | 'objects' | 'symbols' | 'flags';
+}[];