Use libpci to retrieve some basic PCI data

[stsdc]

This is an attempt at porting libpci to vapi and use it in Monitor to detect PCI devices.

Trying to make a basic example to work.

[glm11-aoc]

Just some notes on the code :-)

[ryonakano]

One small tiny nitpicking, otherwise LGTM.

[ryonakano]

LGTM 👍 but there is a nice-catch comment from Leo.

[lenemter]

Looks good and works for me!