feat: Show icon on external links (#3100)

* feat: External links get treatment

* cache decorations

app/utils/urls.ts

@@ -1,25 +1,3 @@
-import { parseDomain } from "@shared/utils/domains";
-
-export function isInternalUrl(href: string) {
-  if (href[0] === "/") {
-    return true;
-  }
-  const outline = parseDomain(window.location.href);
-  const parsed = parseDomain(href);
-
-  if (
-    parsed &&
-    outline &&
-    parsed.subdomain === outline.subdomain &&
-    parsed.domain === outline.domain &&
-    parsed.tld === outline.tld
-  ) {
-    return true;
-  }
-
-  return false;
-}
-
 export function isHash(href: string) {
   if (href[0] === "#") {
     return true;