Add trios — minimal cyberpunk ZSH theme

[MrEchoFi]

New External Theme — trios

Hi, I'd like to add my ZSH theme trios to the External Themes list.

Repo: https://github.com/MrEchoFi/trios-zsh-theme

Features:

• Minimal cyberpunk prompt designed for pentesters and CTF players
• Hexagon bullet segments with electric blue highlights
• Colour-coded command echo (blue = success, red = error)
• No Nerd Font required — uses standard Unicode ⬡
• Tested on Ubuntu, Kali Linux and Parrot OS
• MIT License

Preview screenshot is included in the repo.