feat: add dns resolver/master classes

- define resolver and master dns server
- export A and PTR records from dns clients
- collect exported resources for master
- create hiera structure for acls, zones and views

site/profiles/lib/facter/arpa.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+# arpa_fact.rb
+
+require 'facter'
+
+Facter.add(:arpa) do
+  setcode do
+    arpa_info = {}
+    Facter.value(:networking)['interfaces'].each do |interface_name, values|
+      next unless values.key?('ip')
+
+      ip_address = values['ip']
+      reversed_ip_parts = ip_address.split('.').reverse
+      addr = "#{reversed_ip_parts.join('.')}.in-addr.arpa"
+
+      trimmed_ip_parts = reversed_ip_parts[1..]
+      zone = "#{trimmed_ip_parts.join('.')}.in-addr.arpa"
+
+      arpa_info[interface_name] = {
+        'zone' => zone,
+        'addr' => addr
+      }
+    end
+    arpa_info
+  end
+end