feat: manage proxmox nodes

- change /etc/hosts to meet proxmox requirements
- add proxmox node role
- add init, params, repo, install, clusterjoin classes

modules/libs/lib/facter/pve_nodes_active.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require 'facter'
+
+Facter.add('pve_nodes_active') do
+  confine enc_role: 'roles::infra::proxmox::node'
+  setcode do
+    if Facter::Util::Resolution.which('pvesh')
+      proxmox_nodes = `pvesh get /nodes --output-format json`
+      unless proxmox_nodes.empty?
+        require 'json'
+        nodes = JSON.parse(proxmox_nodes)
+        nodes.count
+      end
+    end
+  end
+end