fix: enable dynamic/tsig updates

- add eyaml to hiera.yaml
- consolidate all paths into single tree
- change to new profiles::dns::client wrapper
- change to new profiles::dns::record wrapper
- change to use concat method to build zone file

site/profiles/templates/dns/zone_header.erb

@@ -0,0 +1,16 @@
+; Managed by Puppet, do not change manually
+$ORIGIN <%= @zone %>.
+$TTL 600
+@   IN  SOA   <%= @nameservers[0] %>. hostmaster.<%= @zone %>. (
+        1 ; Serial
+        604800     ; Refresh
+        86400      ; Retry
+        2419200    ; Expire
+        600 )      ; Negative Cache TTL
+
+; Name servers
+<% @nameservers.each do |ns| -%>
+@   IN  NS    <%= ns %>.
+<% end %>
+
+; Dynamically generated host records