incus/network_peer: Add example for create command #1803

Job	Run time
Code	6m 54s
Client (1.21.x, ubuntu-latest)	1m 7s
Documentation	7m 32s
System (1.21.x, cluster, dir)	11m 56s
Client (1.21.x, macos-latest)	55s
System (1.21.x, cluster, btrfs)	14m 54s
Client (1.21.x, windows-latest)	2m 6s
System (1.21.x, cluster, lvm)	13m 15s
System (1.21.x, cluster, zfs)	13m 34s
System (1.21.x, cluster, ceph)	16m 26s
System (1.21.x, cluster, random)	11m 30s
System (1.21.x, standalone, dir)	21m 8s
System (1.21.x, standalone, btrfs)	24m 36s
System (1.21.x, standalone, lvm)	39m 51s
System (1.21.x, standalone, zfs)	38m 27s
System (1.21.x, standalone, ceph)	1h 14m 24s
System (1.21.x, standalone, random)	34m 48s
System (stable, cluster, dir)	11m 39s
System (stable, standalone, dir)	21m 59s
System (tip, cluster, dir)	11m 36s
System (tip, standalone, dir)	21m 18s
	6h 39m 55s

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