feat: migrate to golang

internal/service/exec_windows.go

@@ -0,0 +1,13 @@
+//go:build windows
+
+package service
+
+import "os"
+
+// isExecutable is a no-op on Windows, which has no POSIX executable bit —
+// executability there is determined by file extension/PATHEXT, not mode
+// bits, matching the practical effect of Python's os.access(..., os.X_OK)
+// which is nearly always true for regular files on Windows.
+func isExecutable(info os.FileInfo) bool {
+	return !info.IsDir()
+}