formula component based on katex

thanks a lot to MoshiBar for the initial implementation!

packages/frontend/src/components/MkFormula.vue

@@ -0,0 +1,33 @@
+<!--
+		 SPDX-FileCopyrightText: dakkar, MoshiBar, and other Sharkey contributors
+		 SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+	<div v-if="block" :class="$style.block" v-html="renderedFormula"></div>
+	<span v-else v-html="renderedFormula"></span>
+</template>
+
+<script lang="ts" setup>
+	import { computed } from 'vue';
+	import katex from 'katex';
+	import 'katex/dist/katex.min.css';
+
+	const props = defineProps<{
+		formula: string;
+		block: boolean;
+	}>();
+
+	const renderedFormula = computed(() =>
+		katex.renderToString(props.formula, {
+			throwOnError: false,
+			trust: false,
+			displayMode: props.block,
+		} as any));
+</script>
+
+<style lang="scss" module>
+	.block {
+		text-align: center;
+	}
+</style>