Add system information script

[vunnyso]

Description of Changes

• Introduce the ghaf-sysinfo service to provide essential Ghaf system information.
• Expose a ghaf-sysinfo CLI that outputs data in human-readable format or JSON.
• Report the following details:
  • Ghaf version
  • Secure Boot status (Enabled/Disabled/Unknown)
  • Disk encryption status (Enabled/Disabled/Unknown)
• Update the ghaf-ctrl panel and givc dependencies

Type of Change

• New Feature
• Bug Fix
• Improvement / Refactor

Related Issues / Tickets

tiiuae/ghaf-givc#362
tiiuae/ghaf-ctrl-panel#188

Checklist

• Clear summary in PR description
• Detailed and meaningful commit message(s)
• Commits are logically organized and squashed if appropriate
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• Author has run make-checks and it passes
• All automatic GitHub Action checks pass - see actions
• Author has added reviewers and removed PR draft status

Testing Instructions

Applicable Targets

• Orin AGX aarch64
• Orin NX aarch64
• Lenovo X1 x86_64
• Dell Latitude x86_64
• System 76 x86_64

Installation Method

• Requires full re-installation
• Can be updated with nixos-rebuild ... switch
• Other:

Test Steps To Verify:

1. Open Control Panel
2. Go to Applications -> System --> Ghaf Control Panel
3. Go to Settings -> About this System

Output example:

[milva-unikie]

Could we also get the device ID in the system information?