chore: import upstream snapshot with attribution

tests/test_cli/test_stdio_encoding.py

@@ -0,0 +1,22 @@
+from __future__ import annotations
+
+import sys
+from io import BytesIO, TextIOWrapper
+
+import typer
+
+from opensquilla.cli.stdio import configure_stdio_for_unicode
+
+
+def test_configure_stdio_for_unicode_allows_typer_echo_on_gbk_stream(
+    monkeypatch,
+) -> None:
+    raw = BytesIO()
+    stream = TextIOWrapper(raw, encoding="cp936", errors="strict")
+    monkeypatch.setattr(sys, "stdout", stream)
+
+    configure_stdio_for_unicode()
+    typer.echo("hello 🦐")
+    stream.flush()
+
+    assert raw.getvalue().decode("utf-8").strip() == "hello 🦐"