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/node.h

@@ -0,0 +1,41 @@
+
+/* Parse tree node interface */
+
+#ifndef Py_NODE_H
+#define Py_NODE_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _node {
+    short		n_type;
+    char		*n_str;
+    int			n_lineno;
+    int			n_col_offset;
+    int			n_nchildren;
+    struct _node	*n_child;
+} node;
+
+PyAPI_FUNC(node *) PyNode_New(int type);
+PyAPI_FUNC(int) PyNode_AddChild(node *n, int type,
+                                      char *str, int lineno, int col_offset);
+PyAPI_FUNC(void) PyNode_Free(node *n);
+PyAPI_FUNC(Py_ssize_t) _PyNode_SizeOf(node *n);
+
+/* Node access functions */
+#define NCH(n)		((n)->n_nchildren)
+	
+#define CHILD(n, i)	(&(n)->n_child[i])
+#define RCHILD(n, i)	(CHILD(n, NCH(n) + i))
+#define TYPE(n)		((n)->n_type)
+#define STR(n)		((n)->n_str)
+
+/* Assert that the type of a node is what we expect */
+#define REQ(n, type) assert(TYPE(n) == (type))
+
+PyAPI_FUNC(void) PyNode_ListTree(node *);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_NODE_H */