feat: Initialize FrontendV2 project with React, Vite, and Tailwind CSS

- Add package.json with dependencies and scripts for development and build
- Include Vite logo and React logo SVGs in public/assets
- Set up Tailwind CSS in App.css and index.css
- Create main App component with routing for Home and Login pages
- Implement LoginPage with authentication logic and error handling
- Add HomePage component as a landing page
- Create MyAlert component for displaying alerts using Chakra UI
- Implement color mode toggle functionality with Chakra UI
- Set up global state management using Jotai for authentication
- Create ProtectedRoutes component to guard routes based on authentication
- Add utility components for Toaster and Tooltip using Chakra UI
- Configure Tailwind CSS and TypeScript settings for the project
- Implement AddLoan component for selecting loan periods and fetching available items

frontend/src/components/AddLoan.tsx

@@ -0,0 +1,69 @@
+import { getBorrowableItems } from "../utils/fetchData";
+import { useAtom } from "jotai";
+import { startDate, endDate } from "../States/Atoms";
+import Cookies from "js-cookie";
+
+export const AddLoan = () => {
+  const [start, setStart] = useAtom(startDate);
+  const [end, setEnd] = useAtom(endDate);
+
+  return (
+    <div className="space-y-4">
+      <h2 className="text-lg sm:text-xl font-bold text-slate-900">
+        1. Zeitraum wählen
+      </h2>
+      <form
+        className="space-y-3"
+        onSubmit={(e) => {
+          e.preventDefault();
+          const form = e.currentTarget as HTMLFormElement;
+          const fd = new FormData(form);
+          const start = (fd.get("startDate") as string) || "";
+          const end = (fd.get("endDate") as string) || "";
+          setStart(start);
+          setEnd(end);
+          Cookies.set("startDate", start);
+          Cookies.set("endDate", end);
+          getBorrowableItems();
+        }}
+      >
+        <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
+          <div>
+            <label
+              htmlFor="startDate"
+              className="block text-sm font-medium text-slate-700 mb-1"
+            >
+              Start
+            </label>
+            <input
+              type="datetime-local"
+              id="startDate"
+              name="startDate"
+              className="w-full border border-slate-300 rounded-lg px-3 py-2.5 focus:ring-2 focus:ring-indigo-500 focus:outline-none bg-white"
+            />
+          </div>
+          <div>
+            <label
+              htmlFor="endDate"
+              className="block text-sm font-medium text-slate-700 mb-1"
+            >
+              Ende
+            </label>
+            <input
+              type="datetime-local"
+              id="endDate"
+              name="endDate"
+              className="w-full border border-slate-300 rounded-lg px-3 py-2.5 focus:ring-2 focus:ring-indigo-500 focus:outline-none bg-white"
+            />
+          </div>
+        </div>
+        <button
+          type="submit"
+          className="w-full bg-indigo-600 text-white font-bold py-2.5 px-4 rounded-lg shadow hover:bg-indigo-700 transition"
+        >
+          Verfügbare Gegenstände anzeigen
+        </button>
+      </form>
+    </div>
+  );
+};