✨ (.zshrc, install.sh): add autojump support and installation across multiple OSes

.zshrc

@@ -224,6 +224,10 @@ source $ZSH/oh-my-zsh.sh
 
 # Configs that can only work after "source $ZSH/oh-my-zsh.sh", such as Aliases that depend oh-my-zsh plugins
 
+# Autojump configuration
+[ -f /usr/local/etc/profile.d/autojump.sh ] && . /usr/local/etc/profile.d/autojump.sh
+[ -f /usr/share/autojump/autojump.sh ] && . /usr/share/autojump/autojump.sh
+
 # Now source fzf.zsh , otherwise Ctr+r is overwritten by ohmyzsh
 [ -f ~/.fzf.zsh ] && source ~/.fzf.zsh
 export FZF_DEFAULT_OPS="--extended"