OPNSense/core 942ddc9. plist, src/opnsense/scripts/interfaces list_interfaces.php

system: add configd call to return json structured interface data using `legacy_interfaces_details()`, while working on https://github.com/opnsense/core/issues/2787 missed something to return configured addresses.
No need to duplicate legacy_interfaces_details.

adds:
```
configctl interface list ifconfig
```

(cherry picked from commit a3cb1a0c59222a06d0a4827077f6aaabe9bdff3e)
DeltaFile
+31-0src/opnsense/scripts/interfaces/list_interfaces.php
+6-0src/opnsense/service/conf/actions.d/actions_interface.conf
+1-0plist
+38-03 files

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