Add Azure deployment examples and enhance configuration management

- Update .gitignore to exclude Terraform files
- Enhance README with Azure deployment instructions
- Refactor publish.sh to use a container for changelog parsing
- Add Azure example files including Terraform configurations
- Create cloud-init templates for PKI and default configurations
- Implement workload VM setup for testing routing

examples/azure/terraform.tfvars.example

@@ -0,0 +1,18 @@
+# Copy to terraform.tfvars (or a git-ignored *.auto.tfvars) and adjust.
+# Keep secrets - psk here - out of any tracked file: set them with
+# TF_VAR_psk or in a git-ignored *.auto.tfvars instead.
+
+location              = "westeurope"
+name                  = "vpn-router-example"
+admin_ssh_public_key  = "ssh-ed25519 AAAA... you@example.com"
+
+local_fqdn   = "router.example.com"
+local_cidrs  = "10.0.3.0/24"
+
+remote_addrs  = "peer.example.net"
+remote_id     = "peer.example.net"
+remote_cidrs  = "192.168.0.0/24"
+
+p2s_enabled       = false
+wireguard_enabled = false
+deploy_workload_vm = false