add autocomplete/suggestions for arguments in Console.hx

[ZwodahS]

There is an existing solution at #832 which does it differently from this implementation.

This implementation uses a function that return the best match instead of a list of suggestions.
Open to suggestions on how to improve this further.

[ZwodahS]

I guess I should also show an example on how I use this

final testNames = [....];
console.addCommand("runtest", "run a specific test", [
	{
		"name": "testName",
		"t": h2d.Console.ConsoleArg.AString,
		"argSuggestions": function(tokenized: Array<String>, arg: String) {
			return utils.findClosestMatch(testNames, arg);
		}
	}
], .... 
`findClosestMatch` essentially is the same way that commands are matched `Console.hx`