fix(client-core): Fix TypeScript module resolution via exports.types (#10209)

Author: spikebrehm

packages/cubejs-client-core/package.json

@@ -13,6 +13,7 @@
   "typings": "dist/src/index.d.ts",
   "author": "Cube Dev, Inc.",
   "exports": {
+    "types": "./dist/src/index.d.ts",
     "import": "./dist/src/index.js",
     "require": "./dist/cubejs-client-core.cjs.js"
   },