feat: Implement header

[iykekings]

Implemented LasCs.header()

[todo]

Throw Error instead of printing to the console

las-cs/src/LasCs.cs

Lines 158 to 163 in a0d0012

	//TODO: Throw Error instead of printing to the console
	Console.WriteLine("There is no header in the file");
	}
	return uncommentSth.Split("\n").Select(m => Regex.Split(m.Trim(), @"\s+|[.]")[0]).ToArray();
	}

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This comment was generated by todo based on a TODO comment in a0d0012 in #5. cc @laslibs.

[iykekings]

@Khelechy I've almost implemented everything.... Now you can just join stuffs and the work will be done. But you will need to implemnt property method. A good example can be found here at common.go in las-go

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https://github.com/laslibs/las-go/blob/7e07e77fb688f280c6e12be6456929815c63e0b7/common.go#L137-L178