Todd Gamblin 7f24b11675 Vendor typing_extensions ... We are using more and more typing features in Spack, and without features like protocols, typing core is becoming harder and harder. I think it's worth vendoring `typing_extensions` for this. It will get us a number of useful capabilities: * `Literal` * `TypedDict` * `Protocol` among others. Signed-off-by: Todd Gamblin <tgamblin@llnl.gov>		2024-12-17 07:25:14 -08:00
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spack	Vendor typing_extensions	2024-12-17 07:25:14 -08:00