Add all the original files from the deleted 0.2.8 npm package

vendor/sdk/_shims/index.js

@@ -0,0 +1,13 @@
+/**
+ * Disclaimer: modules in _shims aren't intended to be imported by SDK users.
+ */
+const shims = require('./registry');
+const auto = require('@anthropic-ai/sdk/_shims/auto/runtime');
+if (!shims.kind) shims.setShims(auto.getRuntime(), { auto: true });
+for (const property of Object.keys(shims)) {
+  Object.defineProperty(exports, property, {
+    get() {
+      return shims[property];
+    },
+  });
+}