Add extracted source directory and README navigation

extracted-source/node_modules/@ant/computer-use-swift/js/index.js

@@ -0,0 +1,23 @@
+const path = require("path");
+
+if (process.platform !== "darwin") {
+  throw new Error("@ant/computer-use-swift is only available on macOS");
+}
+
+// COMPUTER_USE_SWIFT_NODE_PATH: escape hatch for bundlers. Bun's --compile
+// embeds the .node as an asset, not in a node_modules tree — __dirname is the
+// exe dir and ../prebuilds/ doesn't exist. The consuming build bakes this var
+// to the embedded asset's path. Unset → normal node_modules layout.
+//
+// Four methods use `Task { @MainActor in ... }` (captureExcluding,
+// captureRegion, apps.listInstalled, resolvePrepareCapture) which enqueue
+// onto DispatchQueue.main. Electron drains that queue via CFRunLoop; libuv
+// (Node/bun) does not — the promises hang. Consumers running under libuv
+// must pump `_drainMainRunLoop` via setInterval while those promises are
+// pending. Consumers under Electron don't need to (CFRunLoop drains
+// automatically).
+const native = require(
+  process.env.COMPUTER_USE_SWIFT_NODE_PATH ??
+    path.resolve(__dirname, "../prebuilds/computer_use.node"),
+);
+module.exports = native.computerUse;