Kernel: Implement a naive version of virtconsole by memcpying to physical page

This patch allocates a physical page for each of the virtqueues and
memcpys to it when receiving a buffer to get a physical, aligned
contiguous buffer as required by the virtio specification.

Co-authored-by: Sahan <sahan.h.fernando@gmail.com>

Kernel/CMakeLists.txt

@@ -220,6 +220,9 @@ set(KERNEL_SOURCES
     TimerQueue.cpp
     UBSanitizer.cpp
     UserOrKernelBuffer.cpp
+    VirtIO/VirtIO.cpp
+    VirtIO/VirtIOConsole.cpp
+    VirtIO/VirtIOQueue.cpp
     VM/AnonymousVMObject.cpp
     VM/ContiguousVMObject.cpp
     VM/InodeVMObject.cpp