gluon-status-page-api: split API from gluon-status-page

package/gluon-status-page-api/Makefile

.../files/lib/gluon/announce/nodeinfo.d/software/status-page

...s/lib/gluon/status-page/www/cgi-bin/dyn/neighbours-batadv

...lib/gluon/status-page/www/cgi-bin/dyn/neighbours-nodeinfo

...-api/files/lib/gluon/status-page/www/cgi-bin/dyn/stations

...pi/files/lib/gluon/status-page/www/cgi-bin/dyn/statistics

...ge-api/files/lib/gluon/status-page/www/cgi-bin/interfaces

...page-api/files/lib/gluon/status-page/www/cgi-bin/nodeinfo

...atus-page-api/files/lib/gluon/upgrade/500-status-page-api

package/gluon-status-page/Makefile