fix: compare week as numbers and not as strings (#8882)

The repository contributors graph received the stats for each author for each week, these weeks are stored as unix milis values, `Object.entries` converted these values to strings and `sort()` would thus sort them as strings - this worked without a problem for most repository.

If a repository has commits from before 'Sun Sep  9 03:46:40 AM CEST 2001', it meant that the weeks when those commits were made would be sorted towards the end because "1000000000" > "999999999" (when compared as strings) and would thus be silently cut from the data. This edge-case was seen by the curl repository (https://mastodon.social/@bagder/115018271785548165)

Sort them as numbers to avoid this problem, it being stored as strings is otherwise not a problem.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8882
Reviewed-by: Beowulf <beowulf@beocode.eu>
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>

web_src/js/vitest.setup.js

@@ -1,3 +1,7 @@
+import $ from 'jquery';
+
+$.fn.dropdown = () => undefined;
+
 window.__webpack_public_path__ = '';
 
 window.config = {