ci/cd: restore the PR template in the repo so the PR quality check can read it

.github/pull_request_template.md

@@ -0,0 +1,12 @@
+## What and why
+
+## Related issue
+
+## Screenshots
+
+## Contributing Guidelines
+
+Have you read the [Contributing Guidelines](https://github.com/pocket-id/.github/blob/main/CONTRIBUTING.md)?
+
+- [ ] If I'm implementing a new feature, I have opened an issue first, or commented on an existing one, to discuss the implementation details.
+- [ ] I have read the [AI Usage Guidelines](https://github.com/pocket-id/.github/blob/main/CONTRIBUTING.md#ai-usage-policy).

.github/workflows/pr-quality.yml

@@ -54,7 +54,7 @@ jobs:
           # PR Template Checks
           require-pr-template: true
           strict-pr-template-sections: "Contributing Guidelines"
-          optional-pr-template-sections: "Issues"
+          optional-pr-template-sections: "Related issue, Screenshots"
           max-additional-pr-template-sections: 3
 
           # Commit Message Checks