Today we only support globbing files given some patterns. We should allow globbing directories as well.

Sample usage:

var matcher = new Matcher();
matcher.AddInclude("submodules/*/src");
var results = matcher.GetResultsInFullPath(solutionRoot);

and it turns something like
[ "solutionRoot/submodules/FileSystem/src", "solutionRoot/submodules/NuGet/src"]

This is useful in certain scenarios like project resolution.

/cc @troydai