zxing-cpp: strip to core library only (remove tests/wrappers/examples/docs); .gitignore: fix /core to allow zxing-cpp/core/ dir

tools/chatgui/zxing-cpp/core/src/TextDecoder.h

@@ -0,0 +1,23 @@
+/*
+* Copyright 2025 Axel Waggershauser
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "CharacterSet.h"
+#include "ECI.h"
+#include "Range.h"
+
+#include <string>
+
+namespace ZXing {
+
+std::string BytesToUtf8(ByteView bytes, ECI eci);
+
+inline std::string BytesToUtf8(ByteView bytes, CharacterSet cs)
+{
+	return BytesToUtf8(bytes, ToECI(cs));
+}
+
+} // ZXing