test(#10336): add components/Mk[D-E].* stories (#14118)

* test(storybook): add `components/Mk[D-E].*` stories

* fix: mock instance name

* fix: invalid `reactionAcceptance` value

* style: missing trailing commas

packages/frontend/src/components/MkEmojiPicker.section.stories.impl.ts

@@ -0,0 +1,7 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import MkEmojiPicker_section from './MkEmojiPicker.section.vue';
+void MkEmojiPicker_section;