Add database and Prisma configurations, enhance event and leaderboard components with API integration, and update navigation for session management

app/api/events/route.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+
+export async function GET() {
+  try {
+    const events = await prisma.event.findMany({
+      orderBy: {
+        date: "asc",
+      },
+    });
+
+    return NextResponse.json(events);
+  } catch (error) {
+    console.error("Error fetching events:", error);
+    return NextResponse.json(
+      { error: "Erreur lors de la récupération des événements" },
+      { status: 500 }
+    );
+  }
+}
+