add pr request template

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,22 @@
+<!-- 
+Thanks for contributing a pull request! Please ensure that
+your PR satisfies the checklist before submitting:
+- Did you check that the code can be distributed under a MIT license? See License Considerations.
+- Have all GitHub action finished well?
+- Does the documentation render correctly? See Rendering documentation locally with Sphinx.
+- Is the commit message formatted correctly?
+
+Note that we are a team of volunteers; we appreciate your
+patience during the review process.
+
+Again, thanks for contributing!
+-->
+
+#### Reference issue
+<!--Example: Closes gh-WXYZ.-->
+
+#### What does this implement/fix?
+<!--Please explain your changes.-->
+
+#### Additional information
+<!--Any additional information you think is important.-->

CHECKLIST.md

@@ -26,6 +26,7 @@
 - [x] [Security Policy](https://github.com/libresource/open-source-checklist#security-policy)
 - [x] [Governance](https://github.com/libresource/open-source-checklist#governance)
 - [x] [Issue templates](https://github.com/libresource/open-source-checklist#issue-templates)
+- [x] [Pull Request Template](https://github.com/libresource/open-source-checklist#pull-request-template)
 - [x] [Support](https://github.com/libresource/open-source-checklist#support)
 
 [CI and CD](https://github.com/libresource/open-source-checklist#ci-and-cd)