feat: add ability to upload a profile picture (#244)

frontend/src/lib/components/form/file-input.svelte

@@ -0,0 +1,27 @@
+<script lang="ts">
+	import { cn } from '$lib/utils/style';
+	import type { HTMLInputAttributes } from 'svelte/elements';
+	import type { VariantProps } from 'tailwind-variants';
+	import type { buttonVariants } from '$lib/components/ui/button';
+
+	let {
+		id,
+		...restProps
+	}: HTMLInputAttributes & {
+		id: string;
+		variant?: VariantProps<typeof buttonVariants>['variant'];
+	} = $props();
+</script>
+
+<button
+	type="button"
+	onclick={() => document.getElementById(id)?.click()}
+	class={cn(restProps.class)}
+>
+	{#if restProps.children}
+		{@render restProps.children()}
+	{:else}
+		Select File
+	{/if}
+</button>
+<input {id} {...restProps} type="file" class="hidden" />