(captiveportal, new) add initial config template for cp scriptbase

(cherry picked from commit 1c178f36)

src/opnsense/service/templates/OPNsense/Captiveportal/+MANIFEST

+name: opnsense-captiveportal
+version: 0.1
+origin: opnsense/captiveportal
+comment: captiveportal configuration
+desc: configuration templates for captiveportal
+maintainer: ad at opnsense.org
+www: https://opnsense.org
+prefix: /

src/opnsense/service/templates/OPNsense/Captiveportal/+TARGETS

+#rc.conf.d:/etc/rc.conf.d/captiveportal
+captiveportal.conf:/usr/local/etc/captiveportal.conf

src/opnsense/service/templates/OPNsense/Captiveportal/captiveportal.conf

+{% if helpers.exists('OPNsense.captiveportal.zones.zone') %}
+{%   for cpZone in  helpers.toList('OPNsense.captiveportal.zones.zone') %}
+{%     if cpZone.enabled|default('0') == '1' %}
+[zone_{{cpZone.zoneid}}]
+authservers={{ cpZone.authservers }}
+idletimeout={{ cpZone.idletimeout }}
+hardtimeout={{ cpZone.hardtimeout }}
+
+{%     endif %}
+{%   endfor %}
+{% endif %}