Add GitHub Actions workflow for automated formatting, linting, building, and committing

[Copilot]

This PR adds a new GitHub Actions workflow that can be manually triggered to automatically format code, run linting, build the project, execute the comprehensive agent-finish validation sequence, and commit any resulting changes.

What's Added

New Workflow: .github/workflows/format-and-commit.yml

The workflow includes:

• Manual Trigger: Uses workflow_dispatch to allow on-demand execution
• Environment Setup: Configures both Go and Node.js environments with proper caching
• Comprehensive Validation: Runs the complete development pipeline:
  • make fmt - Code formatting
  • make lint - Linting and style checks
  • make build - Binary compilation
  • make agent-finish - Complete validation sequence (includes deps-dev, fmt, lint, js, build, test-all, recompile)
• Smart Commits: Only commits changes if formatting/linting actually modified files
• Proper Git Configuration: Uses github-actions bot identity for automated commits

Use Cases

This workflow is particularly useful for:

• Batch formatting and cleanup of code changes
• Ensuring all validation steps pass before manual review
• Automated maintenance tasks that require committing generated files
• Quick project-wide formatting when multiple contributors have different IDE settings

Implementation Details

The workflow follows the existing repository patterns:

• Uses the same action versions as ci.yml (actions/checkout@v5, actions/setup-go@v5, etc.)
• Leverages the existing Makefile targets for consistency
• Includes proper error handling and shellcheck-compliant scripts
• Validates successfully with actionlint

The change detection logic ensures no empty commits are created, and the commit message provides clear context about what automated changes were applied.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.contoso.com
  • Triggering command: /tmp/go-build1594418971/b278/cli.test -test.testlogfile=/tmp/go-build1594418971/b278/testlog.txt -test.paniconexit0 -test.timeout=10m0s -test.v=true (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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