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/Include/ucnhash.h

@@ -0,0 +1,33 @@
+/* Unicode name database interface */
+
+#ifndef Py_UCNHASH_H
+#define Py_UCNHASH_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* revised ucnhash CAPI interface (exported through a "wrapper") */
+
+#define PyUnicodeData_CAPSULE_NAME "unicodedata.ucnhash_CAPI"
+
+typedef struct {
+
+    /* Size of this struct */
+    int size;
+
+    /* Get name for a given character code.  Returns non-zero if
+       success, zero if not.  Does not set Python exceptions. 
+       If self is NULL, data come from the default version of the database.
+       If it is not NULL, it should be a unicodedata.ucd_X_Y_Z object */
+    int (*getname)(PyObject *self, Py_UCS4 code, char* buffer, int buflen);
+
+    /* Get character code for a given name.  Same error handling
+       as for getname. */
+    int (*getcode)(PyObject *self, const char* name, int namelen, Py_UCS4* code);
+
+} _PyUnicode_Name_CAPI;
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_UCNHASH_H */