añadido componente para crear posts y modificado menu auth

src/lib/components/ui/input-group/input-group-textarea.svelte

@@ -0,0 +1,23 @@
+<script lang="ts">
+	import { cn } from "$lib/utils.js";
+	import { Textarea } from "$lib/components/ui/textarea/index.js";
+	import type { ComponentProps } from "svelte";
+
+	let {
+		ref = $bindable(null),
+		value = $bindable(),
+		class: className,
+		...props
+	}: ComponentProps<typeof Textarea> = $props();
+</script>
+
+<Textarea
+	bind:ref
+	data-slot="input-group-control"
+	class={cn(
+		"flex-1 resize-none rounded-none border-0 bg-transparent py-3 shadow-none focus-visible:ring-0 dark:bg-transparent",
+		className
+	)}
+	bind:value
+	{...props}
+/>