Add core/hyperthread count for Windows and Linux (#5216)

Add core/hyperthread count to `core:sys/info` for Windows and Linux.
TODO: Linux RISCV, Linux ARM, Darwin, and the BSDs.

core/crypto/_aes/hw_intel/api.odin

@@ -6,7 +6,7 @@ import "core:sys/info"
 // is_supported returns true iff hardware accelerated AES
 // is supported.
 is_supported :: proc "contextless" () -> bool {
-	features, ok := info.cpu_features.?
+	features, ok := info.cpu.features.?
 	if !ok {
 		return false
 	}