Add deliver script

Based on Jess Archer's script, this executes a command within a
specified Docker Compose service or, if no matching one is not found,
will execute it locally.

lib/shared/home-manager-packages.nix

@@ -15,6 +15,7 @@ let
   create-zellij-session = writeShellApplication (
     import ./scripts/create-zellij-session.nix { inherit pkgs; }
   );
+  deliver = writeShellApplication (import ./scripts/deliver.nix { inherit pkgs; });
   export-video-list = writeShellApplication (
     import ./scripts/export-video-list.nix { inherit pkgs username; }
   );
@@ -70,6 +71,7 @@ with pkgs;
 
   # Scripts.
   create-zellij-session
+  deliver
   notetaker
   run
   t