docs(readme): describe token setup in prerequisites

Author: remarkablemark

README.md

@@ -1,6 +1,8 @@
 # @remarkablemark/test
 
-[GitHub Package](https://docs.github.com/packages) test
+📦 [GitHub Package](https://docs.github.com/packages) test:
+
+- [npm](https://github.com/remarkablemark/github-package-test/pkgs/npm/test)
 
 ## Prerequisites
 
@@ -11,14 +13,20 @@ Update `.npmrc`:
 //npm.pkg.github.com/:_authToken=${GITHUB_TOKEN}
 ```
 
-Create a [token](https://github.com/settings/tokens):
+Create a [token](https://github.com/settings/tokens) with scope `read:packages` and add to your shell config (e.g., `.zshrc`):
+
+```sh
+export GITHUB_TOKEN=ghp_xxx
+```
 
-- `read:packages`
+Or do with with [GitHub CLI](https://cli.github.com/):
 
-Add to your `.zshrc` or `.bashrc`:
+```sh
+gh auth refresh -h github.com -s read:packages
+```
 
 ```sh
-export GITHUB_TOKEN=ghp_xxx
+echo 'export GITHUB_TOKEN=$(gh auth token)' >> ~/.zshrc
 ```
 
 ## Install