refactor(client): align filename to component name

packages/client/src/components/MkEmojiPicker.section.vue

@@ -0,0 +1,36 @@
+<template>
+<!-- このコンポーネントの要素のclassは親から利用されるのでむやみに弄らないこと -->
+<section>
+	<header class="_acrylic" @click="shown = !shown">
+		<i class="toggle fa-fw" :class="shown ? 'fas fa-chevron-down' : 'fas fa-chevron-up'"></i> <slot></slot> ({{ emojis.length }})
+	</header>
+	<div v-if="shown" class="body">
+		<button
+			v-for="emoji in emojis"
+			:key="emoji"
+			class="_button item"
+			@click="emit('chosen', emoji, $event)"
+		>
+			<MkEmoji class="emoji" :emoji="emoji" :normal="true"/>
+		</button>
+	</div>
+</section>
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue';
+
+const props = defineProps<{
+	emojis: string[];
+	initialShown?: boolean;
+}>();
+
+const emit = defineEmits<{
+	(ev: 'chosen', v: string, event: MouseEvent): void;
+}>();
+
+const shown = ref(!!props.initialShown);
+</script>
+
+<style lang="scss" scoped>
+</style>