chore: add Dependabot config and auto-merge workflow

Merged
RI
3d ago
+182-0

Adds Dependabot configuration for automated dependency updates and an auto-merge workflow that merges Dependabot PRs when CI passes.

Summary by CodeRabbit

  • Chores
    • Dependency updates for npm packages and GitHub Actions are checked monthly, with matching updates grouped into pull requests. Up to five update pull requests can be open for each ecosystem.
    • Eligible dependency update pull requests are automatically merged after their checks succeed. Pull requests with pending or failed checks are not merged automatically.
    • CI workflows can also be started manually.