Multiple customers have now requested scripts for setting hostnames on
macOS, and a couple for Linux. This adds scripts to the solutions folder
for that purpose.
Linux tested against `Ubuntu 26.04` and `openSUSE Tumbleweed`
macOS tested against `Tahoe 26.4.1`
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## Summary by CodeRabbit
* **Documentation**
* Added an automated Linux hostname configuration solution that derives
a hostname from the device serial, applies it system-wide, and updates
host entries.
* Added an automated macOS hostname configuration solution that sets
ComputerName/LocalHostName/HostName from the device serial and reports
the new hostname.
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