feat: upgrade to astro v3

Upgrade to astro v3. Update dependencies. Fix codes and features due to migration.

BREAKING CHANGE: Astro v3

resolve #111

src/components/Card.tsx

@@ -10,21 +10,8 @@ export interface Props {
 export default function Card({ href, frontmatter, secHeading = true }: Props) {
   const { title, pubDatetime, description } = frontmatter;
   return (
-    <li className="my-6">
-      <a
-        href={href}
-        className="inline-block text-lg font-medium text-skin-accent decoration-dashed underline-offset-4 focus-visible:no-underline focus-visible:underline-offset-0"
-      >
-        {secHeading ? (
-          <h2 className="text-lg font-medium decoration-dashed hover:underline">
-            {title}
-          </h2>
-        ) : (
-          <h3 className="text-lg font-medium decoration-dashed hover:underline">
-            {title}
-          </h3>
-        )}
-      </a>
+    <li className="list-card">
+      <a href={href}>{secHeading ? <h2>{title}</h2> : <h3>{title}</h3>}</a>
       <Datetime datetime={pubDatetime} />
       <p>{description}</p>
     </li>