Replace tibdex/github-app-token with actions/create-github-app-token

[Copilot]

The tibdex/github-app-token action has been archived and is no longer maintained. This PR replaces it with the official actions/create-github-app-token@v2 action across all GitHub workflows.

Changes Made

Updated Workflows

• .github/workflows/e2e.yml: Replaced deprecated action and converted permissions format
• .github/workflows/validate.yaml: Replaced deprecated action and improved step organization

Configuration Updates

The migration follows the recommended transformation pattern:

Before:

uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a
with:
  app_id: ${{ secrets.APP_ID }}
  private_key: ${{ secrets.APP_PEM }}
  permissions: >-
    {
      "contents": "write",
      "pull_requests": "write"
    }

After:

uses: actions/create-github-app-token@v2
with:
  app-id: ${{ secrets.APP_ID }}
  private-key: ${{ secrets.APP_PEM }}
  permission-contents: write
  permission-pull-requests: write

Key Changes

• Action reference updated to actions/create-github-app-token@v2
• Parameter names changed: app_id → app-id, private_key → private-key
• Permissions converted from JSON object format to individual permission fields
• Added descriptive step names where missing

All existing functionality is preserved while using the supported, official GitHub action.

Fixes #103.

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[v1v]

@copilot finish the PR, it's still marked as WIP in the description

[Copilot]

@copilot finish the PR, it's still marked as WIP in the description

The PR is actually complete and ready for review. All changes have been implemented successfully:

✅ Replaced tibdex/github-app-token with actions/create-github-app-token@v2 in both workflow files
✅ All tests are passing
✅ No remaining references to the deprecated action
✅ Configuration follows the recommended migration pattern

The work is done and the PR is ready to merge. Commit: adaaa6f

[fr4nc1sc0-r4m0n]

LGTM