chore(eslint): upgrade to eslint v9 and flat config (#2909)

docs/src/theme/prism-include-languages.js

@@ -12,7 +12,6 @@ export default function prismIncludeLanguages(PrismObject) {
   // long as you don't re-assign it
   globalThis.Prism = PrismObject;
   additionalLanguages.forEach((lang) => {
-    // eslint-disable-next-line global-require
     require(`prismjs/components/prism-${lang}`);
   });