CI Scaffolding with Comprehensive Workflows (Issue #3)

[beengud]

Summary

• Added comprehensive CI workflow with lint, test, build, and security checks
• Created documentation verification workflow
• Added dependency management workflow
• Configured rustfmt and updated gitignore

Implementation Details

This PR implements Issue #3 by adding:

1. Main CI Workflow (.github/workflows/ci.yml):

   • Format Check: rustfmt validation
   • Clippy: Linting with warnings as errors
   • Test Suite: Multi-platform (Linux/macOS/Windows) and multi-version (stable/beta)
   • Build Check: Debug and release builds
   • Coverage: cargo-tarpaulin with Codecov upload
   • Docs: API documentation generation and structure validation
   • Security: cargo-audit for vulnerability scanning
   • Phage: Placeholder for future policy checks (commented out)

2. Documentation Workflow (.github/workflows/docs-check.yml):

   • Markdown link validation
   • Documentation structure verification
   • Markdown formatting checks

3. Dependency Workflow (.github/workflows/dependencies.yml):

   • Weekly automated dependency checks
   • Security advisory scanning

4. Configuration Files:

   • .rustfmt.toml: Rust 2024 edition, 100 char width
   • .github/markdown-link-check.json: Link checker config
   • Updated .gitignore for coverage artifacts

CI Features

• Caching: Aggressive caching for faster CI runs
• Matrix Testing: Cross-platform and cross-version validation
• Continue on Error: Security and coverage don't block merges
• Documentation Validation: Ensures required docs exist
• Fail-Safe: Continue even if optional checks fail

Resolves

Closes #3

Test Plan

• CI workflow syntax is valid
• All jobs defined correctly
• Caching configured for performance
• Documentation checks comprehensive
• Security audits in place
• CI runs successfully on PR (will verify after merge)
• Branch protection configured with required checks (post-merge)

Post-Merge Actions

Repository administrators should:

1. Enable required status checks:

   • Format Check (fmt)
   • Clippy Lints (clippy)
   • Test Suite (test) on ubuntu-latest/stable
   • Build Check (build)

2. Optional integrations:

   • Configure Codecov token for coverage reports
   • Set up Dependabot alerts

3. Phage integration:

   • Uncomment phage-check job when Phage is available
   • Add to required status checks

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