Switch to svelte-markdown

src/lib/Code.svelte

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+<script lang="ts">
+  // Disabled for now - it blows up the size too much
+  import { HighlightAuto } from "svelte-highlight";
+  import style from "svelte-highlight/styles/edge-light";
+
+  export let type: "code";
+  export let raw: string;
+  export let codeBlockStyle: "indented" | undefined = undefined;
+  export let lang: string | undefined = undefined;
+  export let text: string;
+
+  // Disable warnings
+  type = "code";
+  raw;
+  codeBlockStyle;
+  lang;
+</script>
+
+<svelte:head>
+  {@html style}
+</svelte:head>
+
+<HighlightAuto code={text} />