docs: add pull request template

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: badchars

.github/pull_request_template.md

@@ -0,0 +1,23 @@
+## Summary
+
+<!-- What does this PR do? 1-2 sentences. -->
+
+## Changes
+
+-
+
+## Type
+
+- [ ] New tool / data source
+- [ ] Bug fix
+- [ ] Enhancement
+- [ ] Documentation
+- [ ] CI / build
+
+## Checklist
+
+- [ ] `bun run build` passes
+- [ ] Tested with `node dist/index.js --tool <name> '{"..."}' `
+- [ ] Tool added to `allTools` array in `tools.ts` (if new tool)
+- [ ] Tool added to `TOOL_CATEGORIES` in `index.ts` (if new tool)
+- [ ] README updated (if user-facing change)