feat: Add HA Kubernetes cluster with Terraform + Ansible

- 3x CX23 control plane nodes (HA)
- 4x CX33 worker nodes
- k3s with embedded etcd
- Hetzner CCM for load balancers
- Gitea CI/CD workflows
- Backblaze B2 for Terraform state

ansible/ansible.cfg

@@ -0,0 +1,14 @@
+[defaults]
+inventory = inventory.ini
+host_key_checking = False
+private_key_file = {{ private_key_file }}
+retry_files_enabled = False
+roles_path = roles
+stdout_callback = yaml
+interpreter_python = auto_silent
+
+[privilege_escalation]
+become = True
+become_method = sudo
+become_user = root
+become_ask_pass = False