Enhance CI robustness and test coverage

[avrabe]

Problem

After the successful rules_rust 0.65.0 upgrade, we've identified several areas where CI and testing can be improved:

Opportunities for Enhancement

1. Expanded test coverage - Some complex examples currently excluded from CI
2. Better error handling - Improve graceful degradation when optional features fail
3. Documentation updates - Update docs to reflect known limitations and workarounds
4. Platform compatibility - Ensure all features work consistently across macOS, Linux, Windows

Current State

• Core functionality: ✅ All working
• Integration tests: ✅ 6/6 passing
• Registry tests: ✅ 7/7 passing
• Basic examples: ✅ All building successfully
• CI smoke tests: ✅ Passing

Requirements for Enhancement

• Add more comprehensive integration tests for complex scenarios
• Improve error messages and user guidance
• Add Windows CI testing
• Create automated testing for known-working subset of examples
• Enhance documentation with troubleshooting guides

Priority

Low - Current functionality is stable, these are quality-of-life improvements

Related Issues

• Builds on Signing toolchain improvements needed #127 (Signing improvements)
• Builds on Improve Go component dependency resolution #128 (Go component improvements)
• Builds on WKG integration toolchain issues #129 (WKG integration improvements)

Context

This issue tracks general improvements after the successful 2.0.0 upgrade to official rules_rust 0.65.0.