Investigate the usage/performance of the enumerator patterns shown in the Touki library

[baronfel]

@JeremyKuhne has a library called Touki that he uses to dive into various aspects of .NET/.NET Framework performance. One of his recent explorations has been a zero-allocation glob expander/enumerator that he wrote with the explicit intention of us being able to use it. It looks very promising:

Runtime repo (.NET 9) - **/*.cs

Method	Mean	Error	StdDev	Ratio	Gen0	Gen1	Allocated	Alloc Ratio
MSBuild	311.5 ms	3.58 ms	2.99 ms	1.00	1500.0000	500.0000	34.39 MB	1.00
GlobFileSystemEnumerator	183.0 ms	2.34 ms	2.19 ms	0.59	333.3333	-	9.74 MB	0.28

I don't have the numbers at hand, but it was even better in the more complex example he just showed me. The tests should show this.

It doesn't yet implement all of our feature set (e.g. Excludes), but it should be able to be added.

We should look at incorporating the methods from this library and comparing them to our existing implementation.