Complete Phase 1 foundation: Tasks 1.1 and 1.2

✅ Task 1.1 - Project Foundation Setup:
- Repository structure with Python packaging (setup.py, pyproject.toml)
- Development dependencies and requirements
- Contributing guidelines and MIT license
- GitHub workflows for CI/CD (test.yml, release.yml)
- Issue and PR templates for community contributions
- Comprehensive project documentation

✅ Task 1.2 - Core Client Structure:
- wikijs package with proper module organization
- Core client class foundation in client.py
- Exception hierarchy for error handling
- Base model classes and page models
- Type checking support (py.typed)
- Utility modules and helper functions

📊 Progress: Phase 1 MVP Development now 40% complete
🎯 Next: Task 1.3 - Authentication System implementation

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/PULL_REQUEST_TEMPLATE.md

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+# Pull Request
+
+## Description
+Brief description of what this PR does and why.
+
+## Type of Change
+Please delete options that are not relevant.
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] Performance improvement
+- [ ] Code refactoring (no functional changes)
+- [ ] Test improvements
+
+## Related Issues
+Closes #(issue_number)
+Relates to #(issue_number)
+
+## Changes Made
+- 
+- 
+- 
+
+## Testing
+- [ ] Tests pass locally
+- [ ] Added tests for new functionality
+- [ ] Updated existing tests
+- [ ] Manual testing completed
+
+Describe any testing you performed:
+
+## Documentation
+- [ ] Updated docstrings
+- [ ] Updated README if needed
+- [ ] Updated API documentation
+- [ ] Added/updated examples
+
+## Code Quality
+- [ ] Code follows the style guidelines
+- [ ] Self-review of the code completed
+- [ ] Code is commented where necessary
+- [ ] No new warnings introduced
+
+## Breaking Changes
+If this introduces breaking changes, please describe them and provide migration guidance:
+
+## Screenshots/Examples
+If applicable, add screenshots or code examples to help explain your changes.
+
+```python
+# Example usage
+```
+
+## Additional Notes
+Any additional information that reviewers should know.
+
+---
+
+## Reviewer Checklist
+- [ ] Code follows project style guidelines
+- [ ] Changes are well documented
+- [ ] Tests are adequate and pass
+- [ ] No obvious bugs or performance issues
+- [ ] Breaking changes are properly documented