feat: gerbview WASM port

wasm/stubs/nl_gerbview_plugin_stub.cpp

@@ -0,0 +1,29 @@
+/*
+ * 3Dconnexion SpaceMouse plugin stubs for KiCad gerbview WASM build.
+ * The 3DxWare driver is unavailable in the browser; these stubs satisfy the
+ * symbols referenced from gerbview_frame.cpp without doing anything.
+ */
+
+// Minimal definition for NL_GERBVIEW_PLUGIN_IMPL — required because the
+// unique_ptr<NL_GERBVIEW_PLUGIN_IMPL> destructor needs a complete type.
+class NL_GERBVIEW_PLUGIN_IMPL {};
+
+#include <navlib/nl_gerbview_plugin.h>
+
+NL_GERBVIEW_PLUGIN::NL_GERBVIEW_PLUGIN()
+{
+}
+
+NL_GERBVIEW_PLUGIN::~NL_GERBVIEW_PLUGIN()
+{
+}
+
+void NL_GERBVIEW_PLUGIN::SetCanvas( EDA_DRAW_PANEL_GAL* aViewport )
+{
+    (void) aViewport;
+}
+
+void NL_GERBVIEW_PLUGIN::SetFocus( bool aFocus )
+{
+    (void) aFocus;
+}