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/cpython-2.7.18/Lib/encodings/hz.py

@@ -0,0 +1,39 @@
+#
+# hz.py: Python Unicode Codec for HZ
+#
+# Written by Hye-Shik Chang <perky@FreeBSD.org>
+#
+
+import _codecs_cn, codecs
+import _multibytecodec as mbc
+
+codec = _codecs_cn.getcodec('hz')
+
+class Codec(codecs.Codec):
+    encode = codec.encode
+    decode = codec.decode
+
+class IncrementalEncoder(mbc.MultibyteIncrementalEncoder,
+                         codecs.IncrementalEncoder):
+    codec = codec
+
+class IncrementalDecoder(mbc.MultibyteIncrementalDecoder,
+                         codecs.IncrementalDecoder):
+    codec = codec
+
+class StreamReader(Codec, mbc.MultibyteStreamReader, codecs.StreamReader):
+    codec = codec
+
+class StreamWriter(Codec, mbc.MultibyteStreamWriter, codecs.StreamWriter):
+    codec = codec
+
+def getregentry():
+    return codecs.CodecInfo(
+        name='hz',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamreader=StreamReader,
+        streamwriter=StreamWriter,
+    )