feat: add authentication and user management features

- Implemented AuthButton component for Discord sign-in and sign-out functionality.
- Created CopyButton component for copying server IP addresses.
- Developed EventCard and GradeCard components for displaying events and grades.
- Added Footer and Navbar components for site navigation and information.
- Introduced PurchaseButton for handling grade purchases with Stripe integration.
- Created SectionHeader component for consistent section titles.
- Implemented session management with SessionProvider for NextAuth.
- Set up PostgreSQL database with Docker and Prisma for data management.
- Added admin guard functionality to restrict access to certain routes.
- Configured NextAuth with Discord provider for user authentication.
- Defined Prisma schema for user, admin, grade, event, and purchase models.
- Seeded database with initial grades and events data.
- Added SVG hero image for the landing page.
- Extended NextAuth types to include additional user properties.

components/session-provider.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import { SessionProvider } from "next-auth/react";
+import type { Session } from "next-auth";
+
+type SessionProviderProps = {
+  children: React.ReactNode;
+  session: Session | null;
+};
+
+export default function AppSessionProvider({
+  children,
+  session,
+}: SessionProviderProps) {
+  return <SessionProvider session={session}>{children}</SessionProvider>;
+}