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

prisma.config.ts

@@ -0,0 +1,14 @@
+// This file was generated by Prisma and assumes you have installed the following:
+// npm install --save-dev prisma dotenv
+import "dotenv/config";
+import { defineConfig, env } from "prisma/config";
+
+export default defineConfig({
+  schema: "prisma/schema.prisma",
+  migrations: {
+    path: "prisma/migrations",
+  },
+  datasource: {
+    url: env("DATABASE_URL"),
+  },
+});