feat(il2cpp): link native methods and export Ghidra seeds

Link IL2CPP metadata names to native addresses and types through shared CLI/MCP workflows, with bounded queries and atomic Ghidra seed export.

Preserve the original implementation by 8rulerstar and follow-up correctness, resource, provenance, and CI dependency repairs. Verified against real Windows/Android artifacts, independent references, actual Ghidra, and focused CLI/MCP tests.

Fixes #5112.

src/il2cpp/Il2cppMetadataFormat.ts

@@ -51,3 +51,16 @@ export const checkRange = (
       `${label} range [${start}, ${start + length}) is outside the ${total} available entries`,
     );
 };
+
+/** Read a serialized index; the all-ones value of narrow widths means -1. */
+export const readIndex = (bytes: Buffer, offset: number, width: 1 | 2 | 4) => {
+  if (width === 1) {
+    const value = bytes.readUInt8(offset);
+    return value === 0xff ? -1 : value;
+  }
+  if (width === 2) {
+    const value = bytes.readUInt16LE(offset);
+    return value === 0xffff ? -1 : value;
+  }
+  return bytes.readInt32LE(offset);
+};