sys/info: add easy way of getting the MacOS version

core/sys/info/sysinfo.odin

@@ -8,6 +8,9 @@ os_version: OS_Version
 ram:        RAM
 gpus:       []GPU
 
+// Only on MacOS, contains the actual MacOS version, while the `os_version` contains the kernel version.
+macos_version: Version
+
 OS_Version_Platform :: enum {
 	Unknown,
 	Windows,
@@ -19,12 +22,14 @@ OS_Version_Platform :: enum {
 	NetBSD,
 }
 
+Version :: struct {
+	major, minor, patch: int,
+}
+
 OS_Version :: struct {
 	platform: OS_Version_Platform,
 
-	major:     int,
-	minor:     int,
-	patch:     int,
+	using _:   Version,
 	build:     [2]int,
 	version:   string,
 
@@ -42,4 +47,4 @@ GPU :: struct {
 	vendor_name: string,
 	model_name:  string,
 	total_ram:   int,
-}
+}