Continue moving personal packages from overlays

Continue moving out of the overlay model for everything and into running
sutff directly out of the packages. This should give a cleaner
separation of the things that I don't need to maintain separately

pkgs/aacs.nix

@@ -0,0 +1,14 @@
+{ writeShellApplication, unzip, ... }:
+
+writeShellApplication {
+  name = "aacs";
+  runtimeInputs = [ unzip ];
+  text = ''
+    [ ! -d "''${HOME}/.config/aacs" ] && mkdir -p "''${HOME}/.config/aacs"
+    cd "''${HOME}/.config/aacs"
+    [ -f KEYDB.cfg.zip ] && rm -f KEYDB.cfg.zip
+    curl -L -o KEYDB.cfg.zip "http://fvonline-db.bplaced.net/fv_download.php?lang=eng"
+    unzip KEYDB.cfg.zip
+    mv keydb.cfg KEYDB.config
+  '';
+}