Add pull request templates

.github/PULL_REQUEST_TEMPLATE/bug.md

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+## Summary
+<!-- Provide a brief summary of the bug and its impact. -->
+
+## Bug / Issue
+<!-- Link to the related issue(s) and describe the bug. Include details like the context, what was expected, and what actually happened. -->
+
+## Implementation
+<!-- Describe the changes made to resolve the issue. Highlight any important parts of the code that were modified. -->
+
+## Testing
+<!-- Detail the testing performed to verify the fix. Include information on test cases, steps taken, and any relevant results.
+
+If you're fixing the visualisation, add before/after screenshots. -->
+
+## Additional Notes
+<!-- Add any additional information that may be relevant for the reviewers, such as potential side effects, dependencies, or related work.

.github/PULL_REQUEST_TEMPLATE/feature.md

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+## Summary
+<!-- Provide a concise summary of the feature and its purpose. -->
+
+## Motive
+<!-- Explain the reasoning behind this feature. Include details on the problem it addresses or the enhancement it provides. -->
+
+## Implementation
+<!-- Describe how the feature was implemented. Include details on the approach taken, important decisions made, and code changes. -->
+
+## Usage Examples
+<!-- Provide code snippets or examples demonstrating how to use the new feature. Highlight key scenarios where this feature will be beneficial.
+
+If you're modifying the visualisation, add before/after screenshots. -->
+
+## Additional Notes
+<!-- Add any additional information that may be relevant for the reviewers, such as potential side effects, dependencies, or related work. -->