Added a link from each opportunity to its latest Find a Tender notice

Opportunities from Find a Tender have a link icon before their title.
Clicking it fetches the opportunity with its releases (the list leaves
them out) and opens its newest release's notice,
www.find-tender.service.gov.uk/notice/<release_id>, in a new tab. The
tab is opened on the click and pointed at the notice when the request
returns, so it isn't blocked as a popup; if the request fails, or there
are no releases, it's closed and a toast says why. Opportunities from
other sources have no link for now, but keep its space so the titles
line up.

The icon is lucide-solid's, added for it at 1.52.0.

web/package.json

@@ -18,6 +18,7 @@
     "sync": "node scripts/syncDist.ts"
   },
   "dependencies": {
+    "lucide-solid": "^1.52.0",
     "solid-js": "^1.9.3"
   },
   "devDependencies": {