[dajiaohuang]

Summary

Replace the stale TypeScript typeRoots instructions with the package import and automatic declaration resolution.

The README currently points readers to node_modules/deepstream.io-client.js/src/client.d.ts. That package path and declaration file are not present in the current @deepstream/client package. Its types field already points to dist/src/deepstream-client.d.ts, so the custom typeRoots entry is unnecessary. The example uses the exported DeepstreamClient name.

Validation

• Built and packed the current package, installed that tarball into a fresh local consumer with install scripts disabled, and compiled the documented import with TypeScript 4.9.5 (--strict --noEmit --target ES2020 --module commonjs --moduleResolution node), without custom typeRoots.
• npm run lint
• npm run test:coverage: 280 passing, 4 pending
• npm run build
• Exercised the exported client with an owned mocked socket: login, event subscription/emission, record reads/updates, list changes, and RPC request/provider responses.

Checks ran on Windows with Node 24.14.1. No real deepstream server/cloud endpoint, browser runtime, or React Native acceptance was exercised; this is a documentation-only change.