[Teton/Voyageurs] Subscribe to scancodes in teton and print them to screen.

Right now there appears to be an error with the font so that the
proper character is received but we write an incorect character to the
screen (off by one?).

sys/teton/CMakeLists.txt

@@ -13,6 +13,7 @@ target_link_libraries(teton
   glacier
   mammoth
   victoriafalls_yunq
+  voyageurs_yunq
   yellowstone_yunq
   )
 

sys/teton/teton.cpp

@@ -1,6 +1,8 @@
+#include <mammoth/ipc/port_server.h>
 #include <mammoth/util/debug.h>
 #include <mammoth/util/init.h>
 #include <victoriafalls/victoriafalls.yunq.client.h>
+#include <voyageurs/voyageurs.yunq.client.h>
 #include <yellowstone/yellowstone.yunq.client.h>
 
 #include "framebuffer/console.h"
@@ -28,13 +30,33 @@ uint64_t main(uint64_t init_port) {
   Psf psf("/default8x16.psfu");
   psf.DumpHeader();
 
+  // 3. Write a line to the screen.
   Console console(fbuf, psf);
   console.WriteString("Hello World!\n");
   for (uint8_t i = 0x20; i < 0x7E; i++) {
     console.WriteChar(i);
   }
 
-  // 3. Write a line to the screen.
+  GetEndpointRequest req;
+  req.set_endpoint_name("voyageurs");
+  Endpoint endpoint;
+  RET_ERR(client.GetEndpoint(req, endpoint));
+
+  VoyageursClient voyaguers(endpoint.endpoint());
+  ASSIGN_OR_RETURN(mmth::PortServer server, mmth::PortServer::Create());
+  KeyboardListener listener;
+  ASSIGN_OR_RETURN(mmth::PortClient pclient, server.CreateClient());
+  listener.set_port_capability(pclient.cap());
+  None n;
+  RET_ERR(voyaguers.RegisterKeyboardListener(listener, n));
+
+  while (true) {
+    ASSIGN_OR_RETURN(char c, server.RecvChar());
+    if (c != '\0') {
+      console.WriteChar(c);
+      dbgln("{}", c);
+    }
+  }
 
   return 0;
 }