Add executable detection and export Codex from the SDK (#4532)

Executable detection uses the same rules as the codex wrapper.

sdk/typescript/jest.config.cjs

@@ -3,14 +3,29 @@ module.exports = {
   preset: "ts-jest/presets/default-esm",
   testEnvironment: "node",
   extensionsToTreatAsEsm: [".ts"],
-  globals: {
-    "ts-jest": {
-      useESM: true,
-      tsconfig: "tsconfig.json",
-    },
-  },
   moduleNameMapper: {
     "^(\\.{1,2}/.*)\\.js$": "$1",
   },
   testMatch: ["**/tests/**/*.test.ts"],
+  transform: {
+    "^.+\\.tsx?$": [
+      "ts-jest",
+      {
+        useESM: true,
+        tsconfig: "tsconfig.json",
+        diagnostics: {
+          ignoreCodes: [1343],
+        },
+        astTransformers: {
+          before: [
+            {
+              path: "ts-jest-mock-import-meta",
+              // Workaround for meta.url not working in jest
+              options: { metaObjectReplacement: { url: "file://" + __dirname + "/dist/index.js" } },
+            },
+          ],
+        },
+      },
+    ],
+  },
 };