Implement Machine Identifiers as Stats

Is your feature request related to a problem? If so, please describe the problem.

Cannot specify machine identifiers via stats:

• Full hostname
• Selected segment(s) of hostname delimited by .
• IPv4 address per LAN/WLAN interface
• IPv6 address per LAN/WLAN interface
• Local network domain name

Describe the feature / solution to your problem you'd like
The ability to display such items via a theme would be useful in data centers, rack mount setups, or wherever else many machines may be in use.

Describe alternatives you've considered / and or tested
This could be implemented via custom stats, but would be nice to have native support.

Screenshots / photos & mockups of the Turing screen
Add screenshots or photos/mockups of the rendering on the Turing screen to help explain your request.
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Environment:

• Revision of this project: Release 3.3.4
• OS with version: Kubuntu 22.04
• Python version: 3.10.12
• Hardware: Simulator (AMD FX-8350)

Additional context
Add any other context or screenshots about the feature request here.

No files or tests are named. Start by locating the theme stats implementation and the existing custom-stats path, then inspect how system information is collected for the simulator and supported Linux environments. Done means themes can display the hostname, selected hostname segments, per-interface IPv4 and IPv6 addresses, and the local network domain name.