implement the native operating system version detection for Windows

[andrewrk]

This is a follow-up task from #4550.

zig/lib/std/zig/system.zig

Lines 223 to 225 in 7617610

	.windows => {
	// TODO Detect native operating system version.
	},

zig/lib/std/target.zig

Lines 75 to 93 in 7617610

	/// Based on NTDDI version constants from
	/// https://docs.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt
	pub const WindowsVersion = enum(u32) {
	nt4 = 0x04000000,
	win2k = 0x05000000,
	xp = 0x05010000,
	ws2003 = 0x05020000,
	vista = 0x06000000,
	win7 = 0x06010000,
	win8 = 0x06020000,
	win8_1 = 0x06030000,
	win10 = 0x0A000000,
	win10_th2 = 0x0A000001,
	win10_rs1 = 0x0A000002,
	win10_rs2 = 0x0A000003,
	win10_rs3 = 0x0A000004,
	win10_rs4 = 0x0A000005,
	win10_rs5 = 0x0A000006,
	win10_19h1 = 0x0A000007,