Create repository templates for issues and pull requests

[alexgrozav]

This issue proposes the creation of repository templates to streamline contributions and issue reporting for the styleframe-dev/styleframe project.

• Create .github/ISSUE_TEMPLATE/bug_report.yml with fields for:
  • Styleframe version
  • Node.js version
  • Package manager version
  • Minimal reproduction
  • Expected vs actual behavior
• Create .github/ISSUE_TEMPLATE/feature_request.yml with fields for:
  • Problem description
  • Proposed solution
  • Alternative solutions considered
  • API design considerations
• Create .github/ISSUE_TEMPLATE/documentation.yml for documentation improvement requests
• Create .github/pull_request_template.md with sections for:
  • Change description
  • Testing checklist
  • Breaking changes section
  • Documentation updates

This will help ensure that contributions and issue reports are clear, actionable, and easy to triage.