refactor(types): centralize type definitions in shared types file

Move all interface and type definitions to src/types/index.ts to reduce code duplication and improve maintainability. This includes types for components, blog posts, personal info, and localization.

src/components/AuthorCard.tsx

@@ -1,19 +1,6 @@
-import type { Lang } from '../i18n/utils';
+import { type AuthorCardProps } from '@/types';
 import { personalInfo } from '@/lib/data';
 
-interface AuthorCardProps {
-  lang: Lang;
-  author?: {
-    name: string;
-    bio?: string;
-    avatar?: string;
-    website?: string;
-    twitter?: string;
-    github?: string;
-    linkedin?: string;
-  };
-}
-
 export default function AuthorCard({ lang, author }: AuthorCardProps) {
   // Default author info based on personalInfo
   const defaultAuthor = {