luci-base: poe and PSE details & configuration

luci-base: poe and PSE details & configuration

Adds PoE/PSE configuration support for modern linux (PSE-PD).
This change is based on the PSE-PD backport (from 6.17)
and netifd|ubus changes.

* Add getPSE() [receive all status information]
and hasPSE() [has the device PSE hardware?]

* Changes ACL permissions to query network.device status information

* Add two new PoE icons (PoE active with link up + link down) for
the port status page

* Changes port status to show PoE information, next to link information
and data transfer.

* Add a new tab for PoE/PSE to the device configuration,
which will only be displayed if the device supports PSE

Signed-off-by: Carlo Szelinsky <redacted>