Add contributing guide (#340)

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,24 @@
+## Description
+<!-- Brief description of what this PR does -->
+
+## Related Issue
+Closes #ISSUE_NUMBER
+
+## Type of Change
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Breaking change
+- [ ] Documentation update
+
+## Testing
+<!-- Describe how you tested your changes -->
+
+## Screenshots (if applicable)
+<!-- Add screenshots here -->
+
+## Checklist
+- [ ] I have read the [Contributing Guide](../CONTRIBUTING.md)
+- [ ] I have announced my intent to work on this and received approval
+- [ ] My code follows the project's code standards
+- [ ] I have tested my changes thoroughly
+- [ ] I have updated relevant documentation