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

resources/views/back/member.blade.php

@@ -6,6 +6,7 @@
     <section>
       <article>
         <h2>Member Listing </h2>
+        <a href="/den/admin/update">UPDATE LOCATIONS</a>
       </article>
     </section>
   @endsection