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/Parser/listnode.c

@@ -0,0 +1,66 @@
+
+/* List a node on a file */
+
+#include "pgenheaders.h"
+#include "token.h"
+#include "node.h"
+
+/* Forward */
+static void list1node(FILE *, node *);
+static void listnode(FILE *, node *);
+
+void
+PyNode_ListTree(node *n)
+{
+    listnode(stdout, n);
+}
+
+static int level, atbol;
+
+static void
+listnode(FILE *fp, node *n)
+{
+    level = 0;
+    atbol = 1;
+    list1node(fp, n);
+}
+
+static void
+list1node(FILE *fp, node *n)
+{
+    if (n == 0)
+        return;
+    if (ISNONTERMINAL(TYPE(n))) {
+        int i;
+        for (i = 0; i < NCH(n); i++)
+            list1node(fp, CHILD(n, i));
+    }
+    else if (ISTERMINAL(TYPE(n))) {
+        switch (TYPE(n)) {
+        case INDENT:
+            ++level;
+            break;
+        case DEDENT:
+            --level;
+            break;
+        default:
+            if (atbol) {
+                int i;
+                for (i = 0; i < level; ++i)
+                    fprintf(fp, "\t");
+                atbol = 0;
+            }
+            if (TYPE(n) == NEWLINE) {
+                if (STR(n) != NULL)
+                    fprintf(fp, "%s", STR(n));
+                fprintf(fp, "\n");
+                atbol = 1;
+            }
+            else
+                fprintf(fp, "%s ", STR(n));
+            break;
+        }
+    }
+    else
+        fprintf(fp, "? ");
+}