Add Arch Wayland dotfiles: sway/waybar/kitty/nvim/zsh, idempotent installer

Auto-adapts sway workspace routing to however many monitors are
connected (laptop vs. desktop) instead of hardcoding output names.

home/.zsh.d/20-options.zsh

@@ -0,0 +1,11 @@
+setopt auto_cd auto_pushd pushd_ignore_dups
+setopt hist_ignore_all_dups hist_reduce_blanks hist_save_no_dups share_history
+setopt interactive_comments extended_glob
+HISTFILE="$HOME/.zsh_history"
+HISTSIZE=50000
+SAVEHIST=10000
+
+[[ -d "$HOME/.cache/zsh" ]] || mkdir -p "$HOME/.cache/zsh"
+autoload -Uz compinit && compinit -d "$HOME/.cache/zsh/zcompdump"
+zstyle ':completion:*' menu select
+zstyle ':completion:*' matcher-list 'm:{a-zA-Z}={A-Za-z}'