feat: manage proxmox nodes

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

site/profiles/templates/proxmox/join_pvecluster.erb

@@ -0,0 +1,11 @@
+#!/usr/bin/expect -f
+set timeout -1
+set password [lindex $argv 0]
+set ip [lindex $argv 1]
+
+spawn pvecm add $ip
+expect "Please enter superuser (root) password for"
+send "$password\r"
+expect "The authenticity of host"
+send "yes\r"
+expect eof