Create SECURITY.md

SECURITY.md

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+Here is a professional and project-tailored Security Policy for your Universal Physics Hub repository. This version is clear, actionable, and matches open-source best practices for a project focused on interactive educational physics simulations.
+
+---
+
+# Security Policy
+
+## Supported Versions
+
+The following table shows which versions of Universal Physics Hub are currently supported with security updates:
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.1.x   | :white_check_mark: |
+| 5.0.x   | :x:                |
+| 4.0.x   | :white_check_mark: |
+| < 4.0   | :x:                |
+
+Only the listed versions above receive security updates. Please upgrade to a supported version to ensure you are protected against vulnerabilities.
+
+## Reporting a Vulnerability
+
+We take security seriously and appreciate your help in keeping Universal Physics Hub and its users safe.
+
+**How to Report**
+
+- Please report security vulnerabilities by emailing us at [sourav.xcd@gmailcom] or by opening a private security advisory on GitHub (recommended).
+- Do **not** disclose security issues publicly until they have been addressed and a fix is released.
+
+**What to Include**
+
+- A detailed description of the vulnerability.
+- Steps to reproduce the issue.
+- Any relevant logs, screenshots, or proof-of-concept code.
+- Your contact information for follow-up.
+
+**Response Process**
+
+- You will receive an initial acknowledgment within 3 business days.
+- We will investigate and provide updates at least once per week while the issue is being resolved.
+- Once a fix is identified, we will coordinate a release and disclosure timeline with you.
+- Credit will be given to reporters unless you request anonymity.
+
+**Scope**
+
+Universal Physics Hub is a React-based educational platform. Please focus reports on vulnerabilities that could impact user data, simulation integrity, code execution, or service availability.
+
+**Out of Scope**
+
+- Vulnerabilities in third-party dependencies (unless they impact Universal Physics Hub directly).
+- Social engineering or physical attacks.
+- Issues in outdated, unsupported versions.
+
+**Stay Up-to-Date**
+
+- Always use the latest supported version for the best security.
+- Follow our [release notes](https://github.com/morningstarxcdcode/Universal-Physics-Hub/releases) for updates and advisories.
+
+---
+
+If you have further requirements or a specific contact method, let me know and I can refine this further!