Fix CJS build

Author: domantas-jurkus-dcd

package.json

@@ -25,7 +25,7 @@
     "codegen": "tsx src/codegen/codegen.ts",
     "build": "pnpm run codegen && pnpm run build:esm && pnpm run build:cjs",
     "build:esm": "tsc -p tsconfig.build.json",
-    "build:cjs": "tsc -p tsconfig.build.cjs.json",
+    "build:cjs": "rm -rf build/cjs && mkdir -p build/cjs && esbuild src/index.ts --bundle --platform=node --format=cjs --external:zod --outfile=build/cjs/index.cjs && dts-bundle-generator -o build/cjs/index.d.cts --project tsconfig.build.json build/esm/index.d.ts",
     "typecheck": "tsc --noEmit",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
@@ -39,6 +39,8 @@
     "@eslint/js": "^9.39.1",
     "@types/json-schema": "^7.0.15",
     "@types/node": "^25.7.0",
+    "dts-bundle-generator": "^9.5.1",
+    "esbuild": "^0.28.0",
     "eslint": "^9.39.1",
     "tsx": "^4.19.0",
     "typescript": "^5.3.3",