factor out resource loading into header

example/windows/flutter/generated_plugin_registrant.cc

@@ -6,6 +6,9 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <polyvox_filament/polyvox_filament_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  PolyvoxFilamentPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("PolyvoxFilamentPlugin"));
 }

example/windows/flutter/generated_plugins.cmake

@@ -3,6 +3,10 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  polyvox_filament
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)
@@ -13,3 +17,8 @@ foreach(plugin ${FLUTTER_PLUGIN_LIST})
   list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
   list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
 endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/windows plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)