docs: add pull request template

Author: vgbr-dev

.github/PULL_REQUEST_TEMPLATE.md

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+---
+name: Pull Request
+about: Submit a code change for review
+
+---
+# Pull Request
+
+## Description
+
+A clear and concise description of what this pull request changes.
+
+## Motivation and Context
+
+Why is this change required? What problem does it solve?
+
+## How Has This Been Tested?
+
+Please describe in detail how you tested your changes.
+
+## Screenshots
+
+If applicable, add screenshots to help explain your changes.
+
+## Types of changes
+
+What types of changes does your code introduce? Put an `x` in all the boxes that apply:
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to change)
+- [ ] Documentation update
+- [ ] Other (please describe):
+
+## Checklist
+
+Put an `x` in all the boxes that apply:
+
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] I have added necessary documentation
+- [ ] My changes generate no new warnings
+- [ ] I have updated the README.md file if necessary

.github/SECURITY.md

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+# Security Policy
+
+## Reporting a Vulnerability
+
+If you discover a security vulnerability, please send an email to [security@example.com](mailto:security@example.com). Please do not create a GitHub issue for the vulnerability.
+
+To help us triage the issue, please include the following information in your email:
+
+- A brief description of the type of vulnerability
+- Steps to reproduce the vulnerability
+- Versions affected
+- Mitigation or workarounds, if any
+
+Our security team will review your report and respond as soon as possible to coordinate remediation.
+
+## Supported Versions
+
+This project is currently supported with security updates for the following versions:
+
+| Version | Supported          |
+|:-------:|-------------------:|
+| 1.x.x   | :white_check_mark: |
+| 0.x.x   | :x:                |
+
+## Security Disclosures
+
+All security disclosures will be promptly acknowledged and investigated by our security team. We will keep you informed throughout the process of our investigation and resolution.
+
+## Security Policy Changes
+
+We reserve the right to make changes to this security policy at any time. If we make changes, we will update the SECURITY.md file and provide a summary of the changes. We encourage users to periodically review this file to stay informed of any changes.