lay down netplay code

src/backend/Netplay.cpp

@@ -0,0 +1,32 @@
+#include <Netplay.hpp>
+#include "log.hpp"
+#include <PIF.hpp>
+
+namespace Netplay {
+bool isHost = false;
+bool connected = false;
+n64::Controller players[4]{};
+
+template <int port>
+void SyncPlayers(n64::PIF& pif) {
+  if(connected) {
+    if(isHost) {
+      pif.PollController();
+    } else {
+      if constexpr (port == 0) {
+        Util::panic("It shouldn't be possible to be player 1 and not be the host");
+      } else if constexpr (port == 1) {
+
+      } else if constexpr (port == 2) {
+
+      } else if constexpr (port == 3) {
+
+      } else {
+        Util::panic("What the heeeeelll oh my gaaaa");
+      }
+    }
+  }
+}
+
+template void SyncPlayers(n64::PIF&);
+}