Webhook automation for GitHub PRs with Slack notifications and Asana task syncing.

• PR Assignment: Auto-assigns one teammate or another when PR marked ready for review
• Review Reassignment: Reassigns PR back to author after approval/rejection
• Slack Notifications: Posts when PRs are opened and ready for review
• Asana Integration: Replaces Asana URLs with task titles, adds PR links to tasks

1. Environment Variables:

   • GITHUB_TOKEN - GitHub Personal Access Token
   • SLACK_WEBHOOK - Slack webhook URL
   • ASANA_API_TOKEN - Asana Personal Access Token

2. GitHub Token Permissions (Fine-grained):

   • Pull requests: Read and Write
   • Issues: Read and Write
   • Contents: Read
   • Metadata: Read

3. Configure Reviewers: Update REVIEWERS array in github.ts with your team members

4. GitHub Webhook:

   • URL: https://your-val-town-url.web.val.run/webhook (note the /webhook)
   • Events: Pull requests, Pull request reviews

• main.ts - Hono webhook handler, sends messages to Slack
• github.ts - GitHub API functions
• asana.ts - Asana API functions