fix(core): Improve streaming support and timeout handling; add browser streaming & timeout tests and README clarifications

ts/client/smartrequest.ts

@@ -164,7 +164,7 @@ export class SmartRequest<T = any> {
   /**
    * Provide a custom function to handle raw request streaming
    * This gives full control over the request body streaming
-   * Note: Only works in Node.js environment
+   * Note: Only works in Node.js environment, not supported in browsers
    */
   raw(streamFunc: RawStreamFunction): this {
     // Store the raw streaming function to be used later