Added blocklist updating, main nav tweaks

Implemented Oliphant's unified tier 3 blocklist and the supplementary
instance audit file that tracks how many times an instance has been
blocked by a trusted sources member. Keeping the update function manual
for now to make sure it works smooth, then well automate so it checks on
    it's on at regular intervals.

NOTE: Lists used are located at the following urls:
https://codeberg.org/oliphant/blocklists/src/branch/main/blocklists/_unified_tier3_blocklist.csv
https://codeberg.org/oliphant/blocklists/src/branch/main/blocklists/other/domain_audit_file.csv

Also simplified the main nav to just include a link to the den index
when logged in

app/Http/Controllers/FrontIndexController.php

@@ -72,8 +72,8 @@ class FrontIndexController extends Controller
     public function listings(int $pageNum = 1)
     {
         $range     = $pageNum * $this->limit - $this->limit;
-        $active    = Location::where("active", true)->get();
-        $locations = Location::where("active", true)
+        $active    = Location::where("active", true)->where('block_count', '>', 2)->get();
+        $locations = Location::where("active", true)->where('block_count', '>', 2)
             ->limit($this->limit)->offset($range)->orderByDesc('id')->get();
         $pageCount = ceil(count($active) / $this->limit);