feat: proper windows support

tests/binary_test/verify_runtime_flags_shape.sh

@@ -1,8 +1,20 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-binary="$1"
+launcher="$1"
 
-grep -Fq -- '--no-install' "${binary}"
-grep -Fq -- '--preload' "${binary}"
-grep -Fq -- '--env-file' "${binary}"
+python3 - "${launcher}" <<'PY'
+import json
+import pathlib
+import sys
+
+path = pathlib.Path(sys.argv[1])
+if path.suffix.lower() == ".cmd":
+    path = pathlib.Path(str(path)[:-4])
+spec = json.loads(pathlib.Path(f"{path}.launcher.json").read_text())
+
+assert "--no-install" in spec["argv"], spec
+assert spec["inherit_host_path"] is False, spec
+assert spec["preload_short_paths"] and spec["preload_short_paths"][0].endswith("tests/binary_test/preload.ts"), spec
+assert spec["env_file_short_paths"] and spec["env_file_short_paths"][0].endswith("tests/binary_test/runtime.env"), spec
+PY