chore: import upstream snapshot with attribution

.github/pull_request_template.md

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+## Summary
+
+<!-- Concisely describe what this PR changes and why. Focus on impact and
+urgency. -->
+
+## Details
+
+<!-- Add any extra context and design decisions. Keep it brief but complete. -->
+
+## Related Issues
+
+<!-- Use keywords to auto-close issues (Closes #123, Fixes #456). If this PR is
+only related to an issue or is a partial fix, simply reference the issue number
+without a keyword (Related to #123). -->
+
+## How to Validate
+
+<!-- List exact steps for reviewers to validate the change. Include commands,
+expected results, and edge cases. -->
+
+## Pre-Merge Checklist
+
+<!-- Check all that apply before requesting review or merging. -->
+
+- [ ] Updated relevant documentation and README (if needed)
+- [ ] Added/updated tests (if needed)
+- [ ] Noted breaking changes (if any)
+- [ ] Validated on required platforms/methods:
+  - [ ] MacOS
+    - [ ] npm run
+    - [ ] npx
+    - [ ] Docker
+    - [ ] Podman
+    - [ ] Seatbelt
+  - [ ] Windows
+    - [ ] npm run
+    - [ ] npx
+    - [ ] Docker
+  - [ ] Linux
+    - [ ] npm run
+    - [ ] npx
+    - [ ] Docker