Adding support for hostnames

[Mzack9999]

Closes #821

$ echo www.scanme.sh | go run . -exclude-hosts scanme.sh -p 80 -verbose

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/_//_/\_,_/\_,_/_.__/\_,_/

                projectdiscovery.io

[INF] Current naabu version 2.1.8 (latest)
[WRN] Skipping host www.scanme.sh as ip 128.199.158.128 was excluded
[INF] Running CONNECT scan with non root privileges
[FTL] Could not run enumeration: no valid ipv4 or ipv6 targets were found
exit status 1

[tarunKoyalwar]

panic

$ echo www.scanme.sh | ./naabu -exclude-hosts scanme.sh -p 80 -v

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/_//_/\_,_/\_,_/_.__/\_,_/

		projectdiscovery.io

[INF] Current naabu version 2.1.8 (latest)
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x1017ec9dc]

goroutine 1 [running]:
github.com/projectdiscovery/dnsx/libs/dnsx.(*DNSX).QueryMultiple(0x16f0cf677?, {0x16f0cf677?, 0x14000c0db18?})
	/Users/tarun/go/pkg/mod/github.com/projectdiscovery/dnsx@v1.1.5/libs/dnsx/dnsx.go:130 +0x1c
github.com/projectdiscovery/naabu/v2/pkg/runner.(*Runner).host2ips(0x14000119800, {0x16f0cf677, 0x9})
	/Users/tarun/Codebase/naabu/v2/pkg/runner/util.go:17 +0x128
github.com/projectdiscovery/naabu/v2/pkg/runner.(*Runner).getExcludeItems(0x16f0cf677?, {0x16f0cf677, 0x9})
	/Users/tarun/Codebase/naabu/v2/pkg/runner/ips.go:44 +0x98
github.com/projectdiscovery/naabu/v2/pkg/runner.(*Runner).parseExcludedIps(0x140000d4d90?, 0x140005d8900)
	/Users/tarun/Codebase/naabu/v2/pkg/runner/ips.go:14 +0x104
github.com/projectdiscovery/naabu/v2/pkg/runner.NewRunner(0x140005d8900)
	/Users/tarun/Codebase/naabu/v2/pkg/runner/runner.go:74 +0xf0
main.main()
	/Users/tarun/Codebase/naabu/v2/cmd/naabu/main.go:15 +0x28

[tarunKoyalwar]

lgtm !

$  echo www.scanme.sh | ./naabu -exclude-hosts scanme.sh -p 80 -v

                  __
  ___  ___  ___ _/ /  __ __
 / _ \/ _ \/ _ \/ _ \/ // /
/_//_/\_,_/\_,_/_.__/\_,_/

		projectdiscovery.io

[INF] Current naabu version 2.1.8 (latest)
[WRN] Skipping host www.scanme.sh as ip 128.199.158.128 was excluded
[INF] Running CONNECT scan with non root privileges
[FTL] Could not run enumeration: no valid ipv4 or ipv6 targets were found