Fix GUI instance counts and launcher tmp paths

cmd/vrc_osc_gui/main.go

@@ -0,0 +1,14 @@
+//go:build windows
+
+package main
+
+import (
+	"log"
+
+	"vrc_osc_go/internal/app"
+)
+
+func main() {
+	_ = app.AppendRuntimeLog("GUI", "starting vrc_osc_gui.exe")
+	log.Fatal(runNativeGUI())
+}