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/blowfish.h

@@ -0,0 +1,54 @@
+// blowfish.h - originally written and placed in the public domain by Wei Dai
+
+/// \file blowfish.h
+/// \brief Classes for the Blowfish block cipher
+
+#ifndef CRYPTOPP_BLOWFISH_H
+#define CRYPTOPP_BLOWFISH_H
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief Blowfish block cipher information
+struct Blowfish_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 4, 56>, public FixedRounds<16>
+{
+	CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "Blowfish";}
+};
+
+// <a href="http://www.cryptopp.com/wiki/Blowfish">Blowfish</a>
+
+/// \brief Blowfish block cipher
+/// \since Crypto++ 1.0
+class Blowfish : public Blowfish_Info, public BlockCipherDocumentation
+{
+	/// \brief Class specific implementation and overrides used to operate the cipher.
+	/// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions
+	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Blowfish_Info>
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+		void UncheckedSetKey(const byte *key_string, unsigned int keylength, const NameValuePairs &params);
+
+	private:
+		void crypt_block(const word32 in[2], word32 out[2]) const;
+
+		static const word32 p_init[ROUNDS+2];
+		static const word32 s_init[4*256];
+
+		FixedSizeSecBlock<word32, ROUNDS+2> pbox;
+		FixedSizeSecBlock<word32, 4*256> sbox;
+	};
+
+public:
+	typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
+	typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
+};
+
+typedef Blowfish::Encryption BlowfishEncryption;
+typedef Blowfish::Decryption BlowfishDecryption;
+
+NAMESPACE_END
+
+#endif