Update .gitignore and refactor Ubuntu template playbook to use role for Proxmox template management

ansible/roles/proxmox_provision/defaults/main.yml

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+---
+# Defaults for proxmox_provision role
+
+# Connection Details (fallbacks, but ideally inherited from inventory group_vars)
+proxmox_api_host: "{{ ansible_host | default(inventory_hostname) }}"
+proxmox_node: "{{ inventory_hostname }}"
+
+# VM Details
+vmid: 0 # 0 lets Proxmox choose next available, or specify fixed ID
+vm_name: "new-vm"
+template_name: "ubuntu-2204-cloud"
+vm_memory: 2048
+vm_cores: 2
+vm_storage: "local-lvm"
+vm_net_bridge: "vmbr0"
+
+# Cloud Init / User Data
+ci_user: "ubuntu"
+# ssh_keys should be a list of public keys
+ssh_keys: []
+
+# State
+vm_state: started

ansible/roles/proxmox_provision/tasks/main.yml

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+---
+- name: Provision VM from Template
+  community.general.proxmox_kvm:
+    api_host: "{{ proxmox_api_host }}"
+    api_user: "{{ proxmox_api_user }}"
+    api_password: "{{ proxmox_api_password }}"
+    # Use remote host verification if you have valid certs, else ignore
+    validate_certs: false
+    
+    node: "{{ proxmox_node }}"
+    vmid: "{{ vmid if vmid | int > 0 else omit }}"
+    name: "{{ vm_name }}"
+    
+    clone: "{{ template_name }}"
+    full: true # Full clone
+    
+    cores: "{{ vm_cores }}"
+    memory: "{{ vm_memory }}"
+    
+    storage: "{{ vm_storage }}"
+    net:
+      net0: "virtio,bridge={{ vm_net_bridge }}"
+      
+    # Cloud Init
+    ciuser: "{{ ci_user }}"
+    sshkeys: "{{ ssh_keys | join('\n') }}"
+    ipconfig:
+      ipconfig0: "ip=dhcp"
+      
+    state: "{{ vm_state }}"
+  register: vm_provision_result
+
+- name: Debug Provision Result
+  debug:
+    var: vm_provision_result
+
+# Note: Waiting for SSH requires knowing the IP.
+# If qemu-guest-agent is installed in the template, we can fetch it.
+# Otherwise, we might need a fixed IP or DNS check.