feat(app): introduce Hall of Fame section and refactor UI

This commit adds the '名人堂' (Hall of Fame) feature and removes the Element Plus dependency.

- feat(content): Add Hall of Fame section with a new content collection, homepage component, and detail pages.
- refactor(join-us): Rewrite the 'Join Us' form to remove Element Plus, using native elements and Reka UI. The form is
temporarily disabled.
- feat(ui): Display cover images on News and Events cards.
- chore: Integrate Umami for web analytics.
- fix: Correct minor text issues, including graduation year in the footer.

public/analytics.js

@@ -0,0 +1,10 @@
+(function () {
+  const UMAMI_SCRIPT_JS = "https://umami.tootaio.com/script.js";
+  const UMAMI_ID = "32769237-81da-4983-aec3-3c1ff9240306";
+
+  var script = document.createElement("script");
+  script.async = true;
+  script.src = UMAMI_SCRIPT_JS;
+  script.setAttribute("data-website-id", UMAMI_ID);
+  document.head.appendChild(script);
+})();