Refactor router ansible config

ansible/router/README.md

ansible/router/ansible.cfg

ansible/router/bootstrap.sh

ansible/router/install.yaml

ansible/router/main/base.yaml

ansible/router/main/templates/etc/iptables/rules.v4.j2

ansible/router/main/templates/etc/iptables/rules.v6.j2

ansible/router/main/vars/base.yaml

ansible/router/requirements.galaxy.yaml

ansible/router/tasks/firewall.yaml

ansible/router/tasks/main.yaml

ansible/router/tasks/packages.yaml

ansible/router/tasks/users.yaml

ansible/router/templates/etc/nftables.conf.j2

ansible/router/templates/etc/ssh/sshd_config.j2