integration(pr-template): Adding PR template for adding new templates

.github/PULL_REQUEST_TEMPLATE/templates.md

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+## Summary
+
+<!-- Brief description of the template(s) being added or modified -->
+
+## Template Type
+
+- [ ] PR template (`.github/PULL_REQUEST_TEMPLATE/`)
+- [ ] Issue template (`.github/ISSUE_TEMPLATE/`)
+- [ ] Mustache template
+- [ ] Other template type: <!-- specify -->
+
+## Templates Affected
+
+<!-- List the template files being added, modified, or removed -->
+
+| File | Action | Purpose |
+|------|--------|---------|
+| `path/to/template.md` | Added/Modified/Removed | Brief description |
+
+## Related Issues
+
+<!-- Link to related issues: Fixes #123, Relates to #456 -->
+
+## Checklist
+
+### General
+- [ ] Template follows repository naming conventions
+- [ ] Template includes clear placeholder text/comments for users
+- [ ] Template is placed in the correct directory
+
+### For PR/Issue Templates
+- [ ] Template includes all required sections
+- [ ] Checkboxes and options are relevant to the template's purpose
+- [ ] Labels are correctly referenced (if applicable)
+
+### For Mustache/Code Templates
+- [ ] Variable placeholders are clearly documented
+- [ ] Default values are sensible (if applicable)
+- [ ] Template renders correctly with test data
+
+## Template Preview
+
+<!-- 
+For PR/Issue templates: Describe key sections and their purpose
+For Mustache templates: Show example rendered output if possible
+-->
+
+## Testing
+
+<!-- How was this template tested? Did you create a test PR/issue using it? -->
+
+## Additional Context
+
+<!-- Any other information reviewers should know about this template -->