[Both] Adds support for installing apps over USB

AltServer/Connections/ALTWiredConnection.h

@@ -0,0 +1,25 @@
+//
+//  ALTWiredConnection.h
+//  AltServer
+//
+//  Created by Riley Testut on 1/10/20.
+//  Copyright © 2020 Riley Testut. All rights reserved.
+//
+
+#import <AltSign/AltSign.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+NS_SWIFT_NAME(WiredConnection)
+@interface ALTWiredConnection : NSObject
+
+@property (nonatomic, copy, readonly) ALTDevice *device;
+
+- (void)sendData:(NSData *)data completionHandler:(void (^)(BOOL, NSError * _Nullable))completionHandler;
+- (void)receiveDataWithExpectedSize:(NSInteger)expectedSize completionHandler:(void (^)(NSData * _Nullable, NSError * _Nullable))completionHandler;
+
+- (void)disconnect;
+
+@end
+
+NS_ASSUME_NONNULL_END