chore: import upstream snapshot with attribution

.github/pull_request_template.md

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+<!--
+Copilot: Fill all sections. Prefer short, concrete answers.
+If a checkbox is selected, add a brief explanation.
+-->
+
+## Summary
+<!-- In 1–2 sentences: what does this PR do? -->
+
+## Why
+<!-- Why is this change needed? Link issues or discussions. -->
+Fixes #
+
+## What changed
+<!-- Bullet list of concrete changes. -->
+- 
+- 
+
+## MCP impact
+<!-- Select one or more. If selected, add 1–2 sentences. -->
+- [ ] No tool or API changes
+- [ ] Tool schema or behavior changed
+- [ ] New tool added
+
+## Prompts tested (tool changes only)
+<!-- If you changed or added tools, list example prompts you tested. -->
+<!-- Include prompts that trigger the tool and describe the use case. -->
+<!-- Example: "List all open issues in the repo assigned to me" -->
+- 
+
+## Security / limits
+<!-- Select if relevant. Add a short note if checked. -->
+- [ ] No security or limits impact
+- [ ] Auth / permissions considered
+- [ ] Data exposure, filtering, or token/size limits considered
+
+## Tool renaming
+- [ ] I am renaming tools as part of this PR (e.g. a part of a consolidation effort)
+   - [ ] I have added the new tool aliases in `deprecated_tool_aliases.go` 
+- [ ] I am not renaming tools as part of this PR
+
+Note: if you're renaming tools, you *must* add the tool aliases. For more information on how to do so, please refer to the [official docs](https://github.com/github/github-mcp-server/blob/main/docs/tool-renaming.md).
+
+## Lint & tests
+<!-- Check what you ran. If not run, explain briefly. -->
+- [ ] Linted locally with `./script/lint`
+- [ ] Tested locally with `./script/test`
+
+## Docs
+
+- [ ] Not needed
+- [ ] Updated (README / docs / examples)