fix: Fix i18n infrastructure

Add dev dependency fix paths and key names so that the default HTML lexer can pick them up

src/index.js

@@ -29,10 +29,10 @@ async function initI18next() {
 function translatePageElements() {
     // Translate content inside a tag
     const translatableElements = document.querySelectorAll(
-        "[data-i18n-key]",
+        "[data-i18n]",
     );
     translatableElements.forEach((el) => {
-        const key = el.getAttribute("data-i18n-key");
+        const key = el.getAttribute("data-i18n");
         el.innerHTML = i18next.t(key);
     });
     // Translate alt texts