refactor: update forms and other areas to use new shadcn components (#1115)

Co-authored-by: Elias Schneider <login@eliasschneider.com>
Co-authored-by: ItalyPaleAle <43508+ItalyPaleAle@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

frontend/src/lib/components/ui/field/field-content.svelte

@@ -0,0 +1,20 @@
+<script lang="ts">
+	import { cn, type WithElementRef } from "$lib/utils/style.js";
+	import type { HTMLAttributes } from "svelte/elements";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		children,
+		...restProps
+	}: WithElementRef<HTMLAttributes<HTMLDivElement>> = $props();
+</script>
+
+<div
+	bind:this={ref}
+	data-slot="field-content"
+	class={cn("group/field-content flex flex-1 flex-col gap-1.5 leading-snug", className)}
+	{...restProps}
+>
+	{@render children?.()}
+</div>