USB Device Redirection for qemu-rdp

Implement MS-RDPEUSB protocol (client & server) in IronRDP with libusb backend and qemu-rdp integration. The goal of this project is to add USB device redirection support to IronRDP, the Rust implementation of the Remote Desktop Protocol. This enables client-attached USB devices (webcams, scanners, security keys, etc.) to be transparently accessed by applications running on the remote server. MS-RDPEUSB is a Dynamic Virtual Channel (DVC) extension that provides low-level USB packet redirection. Unlike high-level device redirection (like file system or audio), USB redirection transfers raw USB packets, allowing any USB device to work remotely without device-specific driver support on the client.