asmrepl: migrate to pkgs/by-name

Moves asmrepl from pkgs/development/interpreters/asmrepl to
pkgs/by-name/as/asmrepl following the new directory structure.
Also renames default.nix to package.nix as per by-name conventions.

pkgs/top-level/all-packages.nix

@@ -1542,8 +1542,6 @@ with pkgs;
 
   apprise = with python3Packages; toPythonApplication apprise;
 
-  asmrepl = callPackage ../development/interpreters/asmrepl { };
-
   avahi-compat = callPackage ../by-name/av/avahi/package.nix {
     withLibdnssdCompat = true;
   };