layout: restructure into src/ tests/ android/ scripts/ tools/

- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
  (+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
  perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten

No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

third_party/cryptopp/hex.h

@@ -0,0 +1,50 @@
+// hex.h - originally written and placed in the public domain by Wei Dai
+
+/// \file hex.h
+/// \brief Classes for HexEncoder and HexDecoder
+
+#ifndef CRYPTOPP_HEX_H
+#define CRYPTOPP_HEX_H
+
+#include "cryptlib.h"
+#include "basecode.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief Converts given data to base 16
+class CRYPTOPP_DLL HexEncoder : public SimpleProxyFilter
+{
+public:
+	/// \brief Construct a HexEncoder
+	/// \param attachment a BufferedTrasformation to attach to this object
+	/// \param uppercase a flag indicating uppercase output
+	/// \param groupSize the size of the output grouping
+	/// \param separator the separator to use between groups
+	/// \param terminator the terminator append after processing
+	HexEncoder(BufferedTransformation *attachment = NULLPTR, bool uppercase = true, int groupSize = 0, const std::string &separator = ":", const std::string &terminator = "")
+		: SimpleProxyFilter(new BaseN_Encoder(new Grouper), attachment)
+	{
+		IsolatedInitialize(MakeParameters(Name::Uppercase(), uppercase)(Name::GroupSize(), groupSize)(Name::Separator(), ConstByteArrayParameter(separator))(Name::Terminator(), ConstByteArrayParameter(terminator)));
+	}
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+};
+
+/// \brief Decode base 16 data back to bytes
+class CRYPTOPP_DLL HexDecoder : public BaseN_Decoder
+{
+public:
+	/// \brief Construct a HexDecoder
+	/// \param attachment a BufferedTrasformation to attach to this object
+	HexDecoder(BufferedTransformation *attachment = NULLPTR)
+		: BaseN_Decoder(GetDefaultDecodingLookupArray(), 4, attachment) {}
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+
+private:
+	static const int * CRYPTOPP_API GetDefaultDecodingLookupArray();
+};
+
+NAMESPACE_END
+
+#endif