feat: migrate remaining applications, services, and user configurations

modules/apps/default.nix

@@ -1,6 +1,18 @@
 {
   imports = [
+    ./arr
     ./bind9
+    ./calibre
+    ./changedetection
+    ./freshrss
+    ./gitea
+    ./homepage
+    ./jellyfin
+    ./plex
+    ./solidtime
+    ./speedtest
     ./technitium-dns
+    ./traefik
+    ./vaultwarden
   ];
 }