Add support for Windows arm64 (#423)

scripts/hak/target.ts

@@ -25,6 +25,7 @@ export type TargetId =
     | "universal-apple-darwin"
     | "i686-pc-windows-msvc"
     | "x86_64-pc-windows-msvc"
+    | "aarch64-pc-windows-msvc"
     | "i686-unknown-linux-musl"
     | "i686-unknown-linux-gnu"
     | "x86_64-unknown-linux-musl"
@@ -98,6 +99,13 @@ const x8664PcWindowsMsvc: WindowsTarget = {
     vcVarsArch: "amd64",
 };
 
+const aarch64WindowsMsvc: WindowsTarget = {
+    id: 'aarch64-pc-windows-msvc',
+    platform: 'win32',
+    arch: 'arm64',
+    vcVarsArch: 'arm64',
+};
+
 const x8664UnknownLinuxGnu: LinuxTarget = {
     id: "x86_64-unknown-linux-gnu",
     platform: "linux",
@@ -162,6 +170,7 @@ export const TARGETS: Record<TargetId, Target> = {
     // Windows
     "i686-pc-windows-msvc": i686PcWindowsMsvc,
     "x86_64-pc-windows-msvc": x8664PcWindowsMsvc,
+    'aarch64-pc-windows-msvc': aarch64WindowsMsvc,
     // Linux
     "i686-unknown-linux-musl": i686UnknownLinuxMusl,
     "i686-unknown-linux-gnu": i686UnknownLinuxGnu,