message: docs: add notes to the README
diff: ## Quick Start
  +> **Note**:
  +> - This library cannot be used in a browser, it depends on native code.
  +> - There is no worker threads support at the moment. See [#169](https://github.com/JCMais/node-libcurl/issues/169)
  +
  ### Install
  ```shell
  npm i node-libcurl --save
  