chore: create pull request template for contributions

Author: colinscz

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,21 @@
+### 🔗 Linked issue
+
+<!-- Please ensure there is an open issue and mention its number. For example, "resolves #123" -->
+
+### 📚 Description
+
+<!-- Describe your changes in detail. Why is this change required? What problem does it solve? -->
+
+<!-- If you used AI tools to help with this contribution, please ensure the PR description and code reflect your own understanding.
+     Write in your own voice rather than copying AI-generated text. -->
+
+<!----------------------------------------------------------------------
+Before creating the pull request, please make sure you do the following:
+
+- Check that there isn't already a PR that solves the problem the same way. If you find a duplicate, please help us reviewing it.
+- Ensure that PR title follows conventional commits (https://www.conventionalcommits.org)
+- Update the corresponding documentation if needed.
+- Include relevant tests that fail without this PR but pass with it.
+
+Thank you for contributing to Npmx!
+----------------------------------------------------------------------->