chore: update the pull request template to be less messy

Author: derklaro

.github/PULL_REQUEST_TEMPLATE.md

@@ -7,23 +7,15 @@ code will be consistent over time. See for example https://betterprogramming.pub
 if you need a bit of guidance while writing your tests.
 -->
 
-### This pull request includes:
+### Motivation
+<!-- Explain the context and why you're making the change (what is the problem solved by this pr) -->
 
-- [ ] 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 api/functionality to change)
-- [ ] I have read the [CONTRIBUTING](../CONTRIBUTING.md) document.
-- [ ] My code follows the code style of this project.
-- [ ] My change requires a change to the documentation or javadocs.
-- [ ] I have updated the documentation accordingly.
-- [ ] I have updated the javadocs accordingly.
-- [ ] I have added tests to cover my changes.
-- [ ] All new and existing tests passed.
+### Modification
+<!-- Describe the modification you've done to the codebase -->
 
-### Changes made to the repository:
+### Result
+<!-- Describe the result of the pull request (what changed compared to before) -->
 
-<!-- A brief description of the changes done in this pull request. -->
-
-### Related issues/discussions:
-
-<!-- Add any related issues here by mentioning them (e.g. Fixes #1). -->  
+##### Other context
+<!-- Other context of the pull request, a discussion, issue or anything else related -->
+Fixes #