veloren-serverbrowser-api 0.4.0

the format of the veloren serverbrowser, so it can be used by other tools
Documentation
GameServerList(
    servers: [
        GameServer(
            name: "Official Veloren Server",
            address: "server.veloren.net",
            port: 14004,
            description: "Welcome to the Veloren Pre-Alpha. Enjoy your journey!",
            location: "DE",
            auth_server: "https://auth.veloren.net",
            channel: Some("weekly"),
            official: true,
            extra: {
                "discord": (
                    name: "Discord",
                    content: url("https://discord.gg/ecUxc9N"),
                ),
                "owners": (
                    name: "Server Owners",
                    content: text("The Veloren core development team"),
                ),
            },
        )
    ]
)