feat: Add Factory GitHub workflows

[eren23]

🤖 Add Factory GitHub Workflows

This PR adds GitHub Actions workflows to integrate with Factory AI's assistant.

Workflows Added:

• @droid: Tag @droid in issues and PR comments
• Droid Review: Automated code review on new PRs

Next Steps:

1. Review the workflow files
2. Add the FACTORY_API_KEY secret to your repository:
   • Go to Settings → Secrets and variables → Actions
   • Click "New repository secret"
   • Name: FACTORY_API_KEY
   • Generate your API key at Factory AI Settings
3. Merge this PR

Usage:

For more information, see the Factory AI documentation.

[factory-droid]

Droid encountered an error —— View job

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[factory-droid]

Droid encountered an error —— View job

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