feat(payment): expose secure APIs and themed pages

packages/payment/package.json

@@ -13,6 +13,7 @@
     ".": "./src/index.ts",
     "./adapters": "./src/adapters.ts",
     "./plugin": "./src/plugin.ts",
+    "./runtime-api": "./src/runtime-api.ts",
     "./runtime-webhook": "./src/runtime-webhook.ts"
   },
   "dependencies": {