refactor(data): move data exports to index file

Consolidate data exports from data.ts to index.ts for better organization and maintainability. Remove the now redundant data.ts file.

src/components/Footer.tsx

@@ -1,6 +1,6 @@
 import { useTranslations } from "@/i18n/utils";
 import type { Lang } from "@/types/i18n";
-import { personalInfo } from "@/lib/data";
+import { personalInfo } from "@/lib/data/index";
 import { motion } from "framer-motion";
 import { useState, useEffect } from "react";
 import { defaultLang } from "@/i18n/ui";