feat: Add pull request and issue templates

Author: clzoc

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a reproducible bug
+title: "[Bug]: "
+labels: bug
+assignees: ''
+
+---
+
+## Description
+<!-- A clear and concise description of the bug. -->
+
+## Steps to Reproduce
+<!-- Provide a step-by-step guide to reproduce the issue. -->
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+## Expected Behavior
+<!-- A clear and concise description of what you expected to happen. -->
+
+## Actual Behavior
+<!-- A clear and concise description of what actually happened. -->
+
+## Environment
+<!-- Please provide details about your environment. -->
+- **Operating System:** [e.g., macOS 14.4.1]
+- **App Version:** [e.g., 1.0.0]
+- **Xcode Version:** [e.g., 15.3]
+
+## Additional Context
+<!-- Add any other context about the problem here. -->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for this project
+title: "[Feature]: "
+labels: enhancement
+assignees: ''
+
+---
+
+## Description
+<!-- A clear and concise description of the feature you are requesting. -->
+
+## Why is this feature needed?
+<!-- Explain the problem this feature would solve or the benefit it would provide. -->
+
+## Proposed Solution (Optional)
+<!-- Describe how you think this feature could be implemented. -->
+
+## Additional Context
+<!-- Add any other context or screenshots about the feature request here. -->

.github/PULL_REQUEST_TEMPLATE.md

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+# Pull Request
+
+## Description
+<!-- Provide a clear and concise description of the changes made in this PR -->
+
+## Type of Change
+<!-- Mark the appropriate option with an [x] -->
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] Performance improvement
+- [ ] Code refactoring (no functional changes)
+- [ ] Documentation update
+- [ ] UI/UX improvement
+- [ ] Build/CI pipeline changes
+- [ ] Other (please describe):
+
+## Related Issues
+<!-- Link to any related issues using the format: Fixes #issue_number -->
+<!-- If no issues are related, you can remove this section -->
+
+## Testing Performed
+<!-- Describe the tests you've performed to verify your changes -->
+<!-- Include details of your testing environment, tests ran, and results -->
+
+## Screenshots
+<!-- For UI changes, include before/after screenshots or screen recordings -->
+<!-- Remove this section if not applicable -->
+
+## Checklist
+<!-- Mark completed items with an [x] -->
+
+### Development
+- [ ] Code follows Swift API Design Guidelines
+- [ ] SwiftLint has been run (`swiftlint autocorrect`)
+- [ ] C code follows Linux kernel coding style (if applicable)
+- [ ] Code is properly documented (DocC for Swift, Doxygen for C)
+- [ ] No new warnings or errors are introduced
+
+### Testing
+- [ ] Added/updated unit tests (80%+ coverage for core modules)
+- [ ] Added/updated performance tests (for battery monitoring changes)
+- [ ] Added/updated UI tests (for power flow visualization changes)
+- [ ] All tests pass locally
+
+### Documentation
+- [ ] Updated documentation for new/modified features
+- [ ] Comments added for complex code sections
+
+### Review Requirements
+- [ ] PR requires 2 maintainer approvals
+- [ ] CI passes SwiftPM tests and lint checks
+- [ ] Security-sensitive code has been audited (if applicable)
+
+## Additional Notes
+<!-- Add any other information about the PR here -->