Bootstrap Go module and action skeleton

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cmd/wails-release/main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+)
+
+func main() {
+	if runtime.GOOS != "darwin" {
+		fmt.Fprintln(os.Stderr, "wails-release: only macOS runners are supported")
+		os.Exit(1)
+	}
+	fmt.Println("wails-release: stub")
+}