Add github-token input to setup-cli action

[Copilot]

The gh extension install command fails in GitHub Actions without GH_TOKEN set. The install script attempts gh extension install as the primary installation method before falling back to direct binary download.

Changes

actions/setup-cli/action.yml

• Add github-token input (optional, defaults to ${{ github.token }})
• Pass token as GH_TOKEN environment variable to install.sh

actions/setup-cli/README.md

• Document github-token input parameter and override usage

pkg/cli/setup_cli_action_integration_test.go

• Add validation for github-token input, GH_TOKEN env var, and default value

Usage

Default behavior (no changes required for existing workflows):

- uses: githubnext/gh-aw/actions/setup-cli@v0.37.20
  with:
    version: v0.37.20

Override with custom token if needed:

- uses: githubnext/gh-aw/actions/setup-cli@v0.37.20
  with:
    version: v0.37.20
    github-token: ${{ secrets.CUSTOM_PAT }}

Original prompt

When generating the call to actions/setup-cli , it must have access to the github token. Add a field to the action to receive the github token and set the default to the github action secret.

See error message:

3s
Run githubnext/gh-aw/actions/setup-cli@v0.37.20
Run /home/runner/work/_actions/githubnext/gh-aw/v0.37.20/actions/setup-cli/install.sh
[INFO] Detected OS: Linux -> linux
[INFO] Detected architecture: x86_64 -> amd64
[INFO] Platform: linux-amd64
[INFO] Using specified version: v0.37.20
[INFO] Validating release v0.37.20 exists...
[INFO] Fetching release data (attempt 1/3)...
[SUCCESS] Release v0.37.20 validated
[INFO] Attempting to install gh-aw using 'gh extension install'...
gh: To use GitHub CLI in a GitHub Actions workflow, set the GH_TOKEN environment variable. Example:
  env:
    GH_TOKEN: ${{ github.token }}
[WARNING] gh extension install completed but verification failed
[INFO] Falling back to manual installation...
[INFO] Download URL: https://github.com/githubnext/gh-aw/releases/download/v0.37.20/linux-amd64
[INFO] Installation directory: /home/runner/.local/share/gh/extensions/gh-aw
[INFO] Creating installation directory...
[INFO] Downloading gh-aw binary...

Custom agent used: agentic-workflows
GitHub Agentic Workflows (gh-aw) - Create, debug, and upgrade AI-powered workflows with intelligent prompt routing

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