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

Executable detection uses the same rules as the codex wrapper.

sdk/typescript/package.json

@@ -42,15 +42,16 @@
   "devDependencies": {
     "@types/jest": "^29.5.14",
     "@types/node": "^20.19.18",
-    "typescript-eslint": "^8.45.0",
     "eslint": "^9.36.0",
     "eslint-config-prettier": "^9.1.2",
+    "eslint-plugin-jest": "^29.0.1",
     "jest": "^29.7.0",
     "prettier": "^3.6.2",
     "ts-jest": "^29.3.4",
     "ts-node": "^10.9.2",
     "tsup": "^8.5.0",
     "typescript": "^5.9.2",
-    "eslint-plugin-jest": "^29.0.1"
+    "typescript-eslint": "^8.45.0",
+    "ts-jest-mock-import-meta": "^1.3.1"
   }
 }