feat: add issue and PR templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior.
+
+**Expected behavior**
+What you expected to happen instead.
+
+**Environment**
+- OS:
+- Project version:
+- Relevant tool/CLI version:
+
+**Additional context**
+Add any other context, logs, or screenshots.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Problem**
+What problem does this solve?
+
+**Solution**
+What would you like to happen?
+
+**Alternatives**
+Any alternative solutions you've considered.
+
+**Additional context**
+Add any other context or examples.

.github/PULL_REQUEST_TEMPLATE.md

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+## Summary
+
+<!-- Briefly describe what this PR does. -->
+
+## Related Issues
+
+<!-- Closes #123 or Relates to #123 -->