[FA-misc] Astro migration works, probably want to touchup the frontend but that can be in Phase 4

fictionarchive-web-astro/src/lib/components/ui/card/card-content.svelte

@@ -0,0 +1,15 @@
+<script lang="ts">
+	import type { HTMLAttributes } from "svelte/elements";
+	import { cn, type WithElementRef } from "$lib/utils.js";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		children,
+		...restProps
+	}: WithElementRef<HTMLAttributes<HTMLDivElement>> = $props();
+</script>
+
+<div bind:this={ref} data-slot="card-content" class={cn("px-6", className)} {...restProps}>
+	{@render children?.()}
+</div>