feat(frontend): 絵文字ピッカーの実装 (#12617)

* 絵文字デッキの作成

* 細かい不備を修正

* fix lint

* fix

* fix CHANGELOG.md

* fix setTimeout -> nextTick

* fix https://github.com/misskey-dev/misskey/pull/12617#issuecomment-1848952862

* fix bug

* fix CHANGELOG.md

* fix CHANGELOG.md

* wip

* Update CHANGELOG.md

* Update CHANGELOG.md

* wip

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/components/MkPostForm.vue

@@ -857,7 +857,7 @@ async function insertEmoji(ev: MouseEvent) {
 		},
 		() => {
 			textAreaReadOnly.value = false;
-			focus();
+			nextTick(() => focus());
 		},
 	);
 }