🔨 chore: add Pull Request template

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,65 @@
+<!--
+  Thank you for contributing to tabi!
+
+  This template is designed to guide you through the pull request process.
+  Please fill out the sections below as applicable.
+
+  Don't worry if your PR is not complete or you're unsure about something;
+  feel free to submit it and ask for feedback. We appreciate all contributions, big or small!
+
+  Feel free to remove any section or checklist item that does not apply to your changes.
+  If it's a quick fix (for example, fixing a typo), a Summary is enough.
+-->
+
+## Summary
+
+<!-- Please provide a brief description of the changes made in this PR -->
+
+### Related issue
+
+<!-- Mention any relevant issues like #123 -->
+
+## Changes
+
+<!-- Please provide some more detail regarding the changes.
+Add any additional information, configuration, or data that might be necessary for the review -->
+
+### Accessibility
+
+<!-- Have you taken steps to make your changes accessible? This could include:
+- Semantic HTML
+- ARIA attributes
+- Keyboard navigation
+- Voiceover or screen reader compatibility
+- Colour contrast
+Please elaborate on the actions taken.
+If you need help, please ask! -->
+
+### Screenshots
+
+<!-- If applicable, add screenshots to help explain the changes made. Consider if a before/after is helpful -->
+
+### Type of change
+
+<!-- Mark the relevant option with an `x` like so: `[x]` (no spaces) -->
+
+- [ ] Bug fix (fixes an issue without altering functionality)
+- [ ] New feature (adds non-breaking functionality)
+- [ ] Breaking change (alters existing functionality)
+- [ ] UI/UX improvement (enhances user interface without altering functionality)
+- [ ] Refactor (improves code quality without altering functionality)
+- [ ] Documentation update
+- [ ] Other (please describe below)
+
+---
+
+## Checklist
+
+- [ ] I have verified the accessibility of my changes
+- [ ] I have tested all possible scenarios for this change
+- [ ] I have made corresponding changes to the documentation:
+  - [ ] Updated `config.toml` comments
+  - [ ] Updated `theme.toml` comments
+  - [ ] Updated "Mastering tabi" post in English
+  - [ ] (Optional) Updated "Mastering tabi" post in Spanish
+  - [ ] (Optional) Updated "Mastering tabi" post in Catalan