Collect information from Channels

[bpe2]

To get an accurate picture of the network a Node is connected to, we must also collect from the Channel.

Configure the channel once a configured NetDevice is attached to it, even if not all Nodes connected are configured.

Add the following components to the module:

ChannelConfiguration

Automatically aggregated when a configured NetDevice attaches to a channel. Flags this Channel for tracking.

Allow for specialized output based on the Channel type, like NetDevice

Represent as an independent entity from NetDevices, but create a direct relationship in output.

Related: https://github.com/usnistgov/ns3-visualizer3d/issues/15