nixos/sway: Install the new default terminal emulator
nixos/sway: Install the new default terminal emulator

The default changed in Sway 1.3 from rxvt_unicode to alacritty. For
backward compatibility we'll install both terminal emulators by default.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs