install yarn

To install Yarn, you can follow the steps below:

1. Visit the official Yarn website at https://classic.yarnpkg.com/en/docs/install.
2. Scroll down to find the installation instructions specific to your operating system (Windows, macOS, or Linux).
3. Follow the instructions provided for your operating system to install Yarn.

For example, on Windows, you can use the following steps:
- Download the installer from the website.
- Run the installer and follow the installation wizard.
- Once the installation is complete, open a new command prompt or terminal window and type `yarn --version` to verify that Yarn is successfully installed.

On macOS, you can use Homebrew to install Yarn by running the following command in the terminal:

brew install yarn

On Linux, you can use the package manager specific to your distribution. For example, on Ubuntu or Debian, you can run the following command in the terminal:

sudo apt-get update && sudo apt-get install yarn

Remember to refer to the official Yarn documentation for the most up-to-date installation instructions for your specific operating system.