chore: Update markdown files

Added CODE_OF_CONDUCT.md
Added CONTRIBUTING.md
Moved CREDITS.md
Moved LICENSES.md
Added SECURITY.md
Added STYLE_GUIDE.md

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+Fennix is a comprehensive operating system comprising:
+- **Kernel**: Core OS functionality.
+- **Drivers**: Hardware interaction layers.
+- **Userspace**: Libraries and utilities, including `libc` and essential services like `init`.
+
+We actively support the latest version of Fennix. Older versions may receive security updates at our discretion.
+
+## Reporting a Vulnerability
+
+To report a security vulnerability, please follow these steps:
+
+1. **Do not disclose the vulnerability publicly** until it has been addressed.
+2. Use [GitHub Issues](https://github.com/EnderIce2/Fennix/issues/new/choose) to report the vulnerability. If you prefer to report it privately, e-mail me at **[enderice2@protonmail.com](mailto:enderice2@protonmail.com)** with the following details:
+    - A clear and detailed description of the vulnerability.
+    - Steps to reproduce the issue.
+    - Any potential impact of the vulnerability.
+    - Relevant logs, screenshots, or proof-of-concept code (if applicable).
+3. We will acknowledge your report within 5 business days.
+
+## Our Process
+
+1. **Triage**: We will validate the vulnerability and determine its severity.
+2. **Resolution**: If confirmed, we will develop and test a fix.
+3. **Notification**: You will be notified once the issue is resolved. If applicable, credit will be given to you in the release notes.
+4. **Update**: The fix will be included in a public release. Ensure you update your system to the latest version.
+
+## General Guidelines
+
+- Keep your Fennix installation updated to benefit from the latest security patches.
+- Regularly review and apply updates to third-party packages and dependencies used in your userspace applications.
+
+---
+
+Thank you for helping to make Fennix a secure and reliable operating system for everyone!
+