chore: Add Pull Request Template (#19)

# Pull Request

## Description

This change adds a new pull request template file to the repository. The template includes a section for describing the changes made, providing context and motivation, and listing any dependencies required for the change. This standardised format will help contributors provide more comprehensive information when submitting pull requests, improving the review process and overall project management.

fixes #1

.github/pull_request_template.md

@@ -0,0 +1,5 @@
+# Pull Request
+
+## Description
+
+Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.