feat(ansible): add K3s installation playbooks and configuration templates

ansible/roles/ssh/templates/sshd_config.j2

@@ -0,0 +1,12 @@
+# SSH 配置模板
+Port {{ ssh_new_port }}
+PermitRootLogin prohibit-password
+PasswordAuthentication no
+PubkeyAuthentication yes
+ChallengeResponseAuthentication no
+UsePAM yes
+X11Forwarding no
+PrintMotd no
+AcceptEnv LANG LC_*
+Subsystem sftp /usr/lib/openssh/sftp-server
+