fix: standardize relative timestamping (#3612)

* fix(frontend): relative timestamps are incorrectly rounded.

Closes: #1371

* fix(all): remove legacy fromNow for proper relative timestamp creation

Closes: #1395

apps/frontend/src/pages/collection/[id].vue

@@ -391,6 +391,7 @@ import {
   DropdownSelect,
   FileInput,
   PopoutMenu,
+  useRelativeTime,
 } from "@modrinth/ui";
 
 import { isAdmin } from "@modrinth/utils";