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/aes.h

@@ -0,0 +1,30 @@
+// aes.h - originally written and placed in the public domain by Wei Dai
+
+/// \file
+/// \brief Class file for the AES cipher (Rijndael)
+/// \details AES is a typdef for Rijndael classes. All key sizes are supported.
+///   The library only provides Rijndael with 128-bit blocks, and not 192-bit or 256-bit blocks
+/// \since Rijndael since Crypto++ 3.1, Intel AES-NI since Crypto++ 5.6.1, ARMv8 AES since Crypto++ 6.0,
+///   Power8 AES since Crypto++ 6.0
+
+#ifndef CRYPTOPP_AES_H
+#define CRYPTOPP_AES_H
+
+#include "rijndael.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief AES block cipher (Rijndael)
+/// \details AES is a typdef for Rijndael classes. All key sizes are supported.
+///   The library only provides Rijndael with 128-bit blocks, and not 192-bit or 256-bit blocks
+/// \sa <a href="http://www.cryptolounge.org/wiki/AES">AES</a> winner, announced on 10/2/2000
+/// \since Rijndael since Crypto++ 3.1, Intel AES-NI since Crypto++ 5.6.1, ARMv8 AES since Crypto++ 6.0,
+///   Power8 AES since Crypto++ 6.0
+DOCUMENTED_TYPEDEF(Rijndael, AES);
+
+typedef RijndaelEncryption AESEncryption;
+typedef RijndaelDecryption AESDecryption;
+
+NAMESPACE_END
+
+#endif