Added new tutorial to enable security in smart intersection application

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metro_si_cybersecurity_tutorial into main

This pull request adds comprehensive documentation for enabling key security features in the Smart Intersection application, and updates the user guide index to include this new security enablement guide. The new documentation provides step-by-step instructions for enabling and verifying dTPM, UEFI Secure Boot, Full Disk Encryption (FDE), and Intel Total Memory Encryption (TME), ensuring robust protection for the application.

Documentation Additions:

  • Added a detailed security enablement guide (application-security-enablement.md) covering:
    • dTPM setup and firmware configuration for hardware-based cryptographic protection.
    • UEFI Secure Boot configuration and certificate enrollment for verified boot integrity.
    • Ubuntu installation with both software-based and hardware-backed Full Disk Encryption to safeguard data at rest.
    • Intel TME enablement and verification for runtime memory encryption.

User Guide Navigation:

  • Updated the user guide index (index.rst) to include a link to the new application security enablement documentation, making it accessible from the main documentation navigation.### Description

Please include a summary of the changes and the related issue. List any dependencies that are required for this change.

Fixes # (issue)

Any Newly Introduced Dependencies

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Checklist:

  • I agree to use the APACHE-2.0 license for my code changes.
  • I have not introduced any 3rd party components incompatible with APACHE-2.0.
  • I have not included any company confidential information, trade secret, password or security token.
  • I have performed a self-review of my code.

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