Parse inspected console item definition

[maksym-nazarenko]

This PR allows to generate MikroTik resource with list of all fields, which are available in RouterOS.
Detailed description is available in README.

Example of generated dhcp-server resource.

$ go run cmd/mikrotik-codegen/main.go mikrotik -commandBase /ip/dhcp-server -name DhcpServer -inspect-definition-file ./inspect_definition.txt

or fully automated way of querying remote system for the fields list:

$ go run cmd/mikrotik-codegen/main.go mikrotik -commandBase /ip/dhcp-server -name DhcpServer -query-definition

show output

type DhcpServer struct {
        Id                   string `mikrotik:".id"`
        AddArp               string `mikrotik:"add-arp"`
        AddressPool          string `mikrotik:"address-pool"`
        AllowDualStackQueue  string `mikrotik:"allow-dual-stack-queue"`
        AlwaysBroadcast      string `mikrotik:"always-broadcast"`
        Authoritative        string `mikrotik:"authoritative"`
        BootpLeaseTime       string `mikrotik:"bootp-lease-time"`
        BootpSupport         string `mikrotik:"bootp-support"`
        ClientMacLimit       string `mikrotik:"client-mac-limit"`
        Comment              string `mikrotik:"comment"`
        ConflictDetection    string `mikrotik:"conflict-detection"`
        CopyFrom             string `mikrotik:"copy-from"`
        DelayThreshold       string `mikrotik:"delay-threshold"`
        DhcpOptionSet        string `mikrotik:"dhcp-option-set"`
        Disabled             string `mikrotik:"disabled"`
        InsertQueueBefore    string `mikrotik:"insert-queue-before"`
        Interface            string `mikrotik:"interface"`
        LeaseScript          string `mikrotik:"lease-script"`
        LeaseTime            string `mikrotik:"lease-time"`
        Name                 string `mikrotik:"name"`
        ParentQueue          string `mikrotik:"parent-queue"`
        Relay                string `mikrotik:"relay"`
        ServerAddress        string `mikrotik:"server-address"`
        UseFramedAsClassless string `mikrotik:"use-framed-as-classless"`
        UseRadius            string `mikrotik:"use-radius"`
}

[ddelnano]

Sorry for the extremely late review on this. Very exciting to see the code generation pieces coming together!