added --silent and register values in windows registry keys

spm/register_unix.go

@@ -0,0 +1,17 @@
+// run_default.go
+//go:build !windows
+// +build !windows
+
+package spm
+
+import "fmt"
+
+// RegisterApp is not supported on non-Windows platforms.
+func RegisterApp() error {
+	return fmt.Errorf("RegisterApp is only available on Windows")
+}
+
+// UnregisterApp is not supported on non-Windows platforms.
+func UnregisterApp() error {
+	return fmt.Errorf("UnregisterApp is only available on Windows")
+}