add file stub

platform/file.go

@@ -0,0 +1,22 @@
+package platform
+
+import "github.com/FooSoft/lazarus/formats/mpq"
+
+var fileState struct {
+	mountPoints map[string]mpq.MpqArchive
+}
+
+type File struct {
+}
+
+func FileMountArchive(mountPath, archivePath string) error {
+	return nil
+}
+
+func FileUnmountArchive(mountPath string) error {
+	return nil
+}
+
+func FileOpen(path string) (*File, error) {
+	return nil, nil
+}