Configure Dependabot auto-labeling and conventional commits

[Copilot]

Dependabot PRs now auto-label with "area: dependencies" via native config, avoiding redundant PR labeler workflow runs. Changesets use conventional commit format.

Changes

• .github/dependabot.yml: Added labels: ["area: dependencies"] to npm and github-actions ecosystems
• .github/workflows/pr-labeler.yml: Added if: github.actor != 'dependabot[bot]' to skip redundant labeling
• .github/workflows/dependabot-changeset.yml: Set use-conventional-commits: true

Example

# dependabot.yml
updates:
  - package-ecosystem: "npm"
    directory: "/"
    schedule:
      interval: "weekly"
    labels:
      - "area: dependencies"  # Auto-applies on PR creation

The PR labeler workflow no longer processes Dependabot PRs since the label is applied upstream, reducing CI overhead.

Original prompt

Ignore adding labels to PRs made by dependabot and make dependabot use automatically the "area: dependencies" in the dependabot.yml. Use changeset and convential commits.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 5a65800

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
geo-invaders	Patch

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