Add SerpentOS

[Tsu-gu]

https://serpentos.com/

Atomic updates and stateless design ensure your system remains reliable and recoverable, even after interrupted updates.

[Malix-Labs]

Key point: written in Rust

https://serpentos.com/about/

Also its toolchain (package manager and builder) :

• https://serpentos.com/moss/
• https://serpentos.com/boulder/

I would consider it