This PR adds a template for PR descriptions, aimed to provide suffici…

…ent details

about the changes being made.

.github/PULL_REQUEST_TEMPLATE.md

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+# Description
+
+Start with a short description of what the PR does and how this is a change from
+the past.
+
+The rest of the description includes relevant details and context, examples:
+- why is this change being made,
+- the problem being solved and any relevant context,
+- why this is a good solution,
+- some information about the specific implementation,
+- shortcomings of the solution and possible future improvements.
+
+If the change fixes a bug or a Github issue, please include a link, e.g.,:
+FIXES: b/123456
+FIXES: #123456
+
+# Tests
+
+Please describe how you tested this change, and include any instructions and/or
+commands to reproduce.
+
+# Checklist
+
+Before submitting this PR, please make sure (put X in square brackets):
+- [ ] I have performed a self-review of my code.
+- [ ] I have necessary comments in my code, particularly in hard-to-understand areas.
+- [ ] I have run end-to-end tests tests and provided workload links above if applicable.
+- [ ] I have made or will make corresponding changes to the doc if needed.

.github/workflows/require-checklist.yml

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+name: Require Checklist
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+jobs:
+  check_pr_body:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: mheap/require-checklist-action@v2
+        with:
+          requireChecklist: true # If this is true and there are no checklists detected, the action will fail