Dont install packages if they already exist

install_sway.sh

@@ -1,6 +1,6 @@
 pacman-key --init
 pacman-key --populate
-pacman -Syu --noconfirm git ansible
+pacman -Syu --noconfirm --needed git ansible
 git clone https://gitea.maiertobi.de/tobimai/setup_ansible_playbooks.git install
 cd install
 ansible-galaxy install -r requirements.yml