Add missing fields to NetworkEntry

[vv9k]

What did you implement:

Added missing fields to NetEntry, namely Links, Aliases and IPAMConfig.

Closes: #227

How did you verify your change:

Tested locally and got expected results:

❯ cargo run --example containerinspect -- f74a8ceb19a9
    Blocking waiting for file lock on build directory
   Compiling shiplift v0.7.0 (/home/wojtek/dev/shiplift)
    Finished dev [unoptimized + debuginfo] target(s) in 5.42s
     Running `target/debug/examples/containerinspect f74a8ceb19a9`
ContainerDetails {
    app_armor_profile: "",
    args: [
        "10000",
    ],
    config: Config {
        attach_stderr: true,
        attach_stdin: true,
        attach_stdout: true,
        cmd: Some(
            [
                "sleep",
                "10000",
            ],
        ),
        domainname: "",
        entrypoint: None,
        env: Some(
            [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
            ],
        ),
        exposed_ports: None,
        hostname: "f74a8ceb19a9",
...
    network_settings: NetworkSettings {
        bridge: "",
        gateway: "",
        ip_address: "",
        ip_prefix_len: 0,
        mac_address: "",
        ports: Some(
            {},
        ),
        networks: {
            "shiplift_netnet": NetworkEntry {
                network_id: "7640c010a6863daa4efe9ad43f3158a0129264d9fac80a0c731b8ed36b071b23",
                endpoint_id: "59920e3c8efcb2994f3870b74df199a17c4b0edcf6158d46e7a07754df62bc7b",
                gateway: "172.19.0.1",
                ip_address: "172.19.0.3",
                ip_prefix_len: 16,
                ipv6_gateway: "",
                global_ipv6_address: "",
                global_ipv6_prefix_len: 0,
                mac_address: "02:42:ac:13:00:03",
                links: None,
                aliases: Some(
                    [
                        "f74a8ceb19a9",
                    ],
                ),
                ipam_config: None,
            },
        },
    },

What (if anything) would need to be called out in the CHANGELOG for the next release:

NetworkEntry now contains extra fields: links, addresses, ipam_config

[elihunter173]

Looks good to me

[vv9k]

Rebased to current master, if there are no suggestions it's ready to get merged.

[matthiasbeyer]

Looks good.