feat(ui): add reusable components for FIGMA-based UI system

- Implemented new reusable components including Label, Input, InputOTP, HoverCard, Popover, Pagination, NavigationMenu, Menubar, ScrollArea, Resizable, RadioGroup, and Progress under `docs/06_Frontend/FIGMA/src/app/components/ui/`.
- Enhanced structural organization to improve scalability and maintainability.
- Updated `settings.gradle.kts` to include the new module `frontend:features:nennung-feature`.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

docs/06_Frontend/FIGMA/src/app/components/ui/textarea.tsx

@@ -0,0 +1,18 @@
+import * as React from "react";
+
+import {cn} from "./utils";
+
+function Textarea({className, ...props}: React.ComponentProps<"textarea">) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        "resize-none border-input placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 flex field-sizing-content min-h-16 w-full rounded-md border bg-input-background px-3 py-2 text-base transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+export {Textarea};