Add Dependabot configuration for automated dependency updates

[Copilot]

This PR adds Dependabot configuration to automatically monitor and update project dependencies, improving security and maintenance efficiency.

Changes

• Added .github/dependabot.yml - Comprehensive Dependabot configuration tailored for this TypeScript/Node.js project

Configuration Features

📦 Package Management

• Configured for npm ecosystem with pnpm package manager support
• Monitors the root directory for dependency changes

⏰ Update Schedule

• Daily updates at 09:00 UTC to keep dependencies current
• Limited to 5 open PRs maximum to avoid overwhelming maintainers

🔄 Dependency Grouping

• Production dependencies: Groups Hono-related packages (@hono/*, hono, hono-sessions), dotenv, ws
• Development dependencies: Groups tooling (@biomejs/*, @playwright/*, @types/*, tsx, typescript, vitest)
• Updates grouped by type for easier review and testing

🏷️ PR Organization

• Commit prefixes: deps for production, deps-dev for development dependencies
• Labels: Automatically adds dependencies and automated-pr labels
• Scope inclusion in commit messages for better traceability

🛡️ Stability & Security

• Minor and patch updates only - Major versions ignored for stability
• Security updates allowed for all dependency types
• Maintains compatibility while ensuring timely security patches

Benefits

✅ Automated security updates for vulnerable dependencies
✅ Regular maintenance to keep the project current
✅ Grouped updates for efficient review process
✅ Better security posture through timely dependency updates
✅ Reduced manual overhead for dependency management

Validation

• ✅ YAML syntax validated
• ✅ All current dependencies covered by grouping patterns
• ✅ No impact on existing CI/CD pipeline
• ✅ Configuration tested against project structure

The configuration will become active once this PR is merged and will help maintain the project's dependencies automatically while preserving stability through careful update policies.

Created from VS Code via the GitHub Pull Request extension.

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[mahata]

@copilot Delete this commented out section.

[Copilot]

Removed the commented reviewer section as requested. (0b97875)