docs: add GitHub issue templates for bug reports and feature requests (closes #1)

[ghzhost]

Closes #1

Goal

Add clear, structured GitHub issue templates (using YAML form schemas) that help contributors report reproducible bugs and propose new features with appropriate details and labels.

Scope

• Added .github/ISSUE_TEMPLATE/bug_report.yml:
  • Captures problem description, reproduction steps, expected vs actual behavior, environment & versions (OS, Python, Node, OpenOrbit), and optional logs/screenshots.
  • Automatically tags new submissions with bug.
• Added .github/ISSUE_TEMPLATE/feature_request.yml:
  • Captures problem statement/motivation, proposed solution/behavior, alternatives considered, and additional context.
  • Automatically tags new submissions with enhancement.
• Kept templates clean, concise, and structured according to standard GitHub issue form specifications.

Validation

• Verified YAML syntax validity and schema keys.
• Ran git diff --check cleanly.
• Validated test suite (PYTHONPATH=. pytest tests/).