add PR templates (ecmwf#161)

* add pr templates

* add pr templates

Author: iluise

.github/pull_request_template.md

@@ -0,0 +1,46 @@
+## Description
+
+<!-- Provide a brief summary of the changes introduced in this pull request. -->
+
+## Type of Change
+
+-   [ ] 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
+
+## Issue Number
+
+<!-- Link the Issue number this change addresses, ideally in one of the "magic format" such as Closes #XYZ -->
+
+<!-- Alternatively, explain the motivation behind the changes and the context in which they are being made. -->
+
+## Code Compatibility
+
+-   [ ] I have performed a self-review of my code
+
+### Code Performance and Testing
+
+-   [ ] If the new feature introduces modifications at the config level, I have made sure to have notified the other software developers throuth Mattermost and updated the paths in the `$WEATHER_GENERATOR_PRIVATE` directory
+
+<!-- In case this affects the model sharding or other specific components please describe these here. -->
+
+### Dependencies
+
+-   [ ] I have ensured that the code is still pip-installable after the changes and runs
+-   [ ] I have tested that new dependencies themselves are pip-installable.
+-   [ ] I have not introduced new dependencies in the inference portion of the pipeline
+
+<!-- List any new dependencies that are required for this change and the justification to add them. -->
+
+### Documentation
+
+-   [ ] My code follows the style guidelines of this project
+-   [ ] I have updated the documentation and docstrings to reflect the changes
+-   [ ] I have added comments to my code, particularly in hard-to-understand areas
+
+<!-- Describe any major updates to the documentation -->
+
+## Additional Notes
+
+<!-- Include any additional information, caveats, or considerations that the reviewer should be aware of. -->