Update Ansible configuration and enhance playbook

- Add UFW configuration to secure server ports
- Install additional packages including vim, zsh, and monitoring tools
- Change default shell for 'deploy' user to zsh
- Update .gitignore to include Ansible inventory files

.gitignore

@@ -64,4 +64,8 @@ build/
 
 # Bots
 /bots/*
-!/bots/.gitkeep
+!/bots/.gitkeep
+
+# Ansible inventory files (contain sensitive server info)
+infra/ansible/inventory.ini
+infra/ansible/inventory_*.ini