feat: add Touch ID authentication support for macOS (#16707)

This PR adds Touch ID authentication support for macOS with two new `SystemPreferences` methods.

1. `systemPreferences.promptForTouchID()` returns a Promise that resolves with `true` if successful and rejects with an error message if authentication could not be completed.
2. `systemPreferences.isTouchIDAvailable()` returns a Boolean that's `true` if this device is a Mac running a supported OS that has the necessary hardware for Touch ID and `false` otherwise.

atom/browser/mac/atom_application.h

@@ -7,6 +7,7 @@
 #include "base/mac/scoped_sending_event.h"
 
 #import <AVFoundation/AVFoundation.h>
+#import <LocalAuthentication/LocalAuthentication.h>
 
 // Forward Declare Appearance APIs
 @interface NSApplication (HighSierraSDK)
@@ -16,6 +17,22 @@
 - (void)setAppearance:(NSAppearance*)appearance API_AVAILABLE(macosx(10.14));
 @end
 
+#if !defined(MAC_OS_X_VERSION_10_13_2)
+
+// forward declare Touch ID APIs
+typedef NS_ENUM(NSInteger, LABiometryType) {
+  LABiometryTypeNone = 0,
+  LABiometryTypeFaceID = 1,
+  LABiometryTypeTouchID = 2,
+} API_AVAILABLE(macosx(10.13.2));
+
+@interface LAContext (HighSierraPointTwoSDK)
+@property(nonatomic, readonly)
+    LABiometryType biometryType API_AVAILABLE(macosx(10.13.2));
+@end
+
+#endif
+
 // forward declare Access APIs
 typedef NSString* AVMediaType NS_EXTENSIBLE_STRING_ENUM;