Add installers folder to copyparty configuration

- New /installers volume for game installers and ISO files
- Accessible to both guest and hoborg users
- Complements existing torrent categorization structure

config/copyparty/copyparty.conf

@@ -64,6 +64,12 @@
     rw: guest
     rwmd: hoborg
 
+[/installers]
+  /mnt/nas/installers
+  accs:
+    rw: guest
+    rwmd: hoborg
+
 [/torrent]
   /mnt/nas/torrent
   accs: