Add Idan1993/zsh-htb-theme

Add `Idan1993/zsh-htb-theme` theme now that ibyf0r3ns1cs/zsh-terminal-themes#1 is closed

Signed-off-by: Joe Block <[email protected]>

Author: unixorn

README.md

@@ -1884,6 +1884,7 @@ If you're using [Antigen](https://github.com/zsh-users/antigen), you can test th
 - [horizontal](https://github.com/nuimk/horizontal) - Two line prompt with a horizontal separator.
 - [hornix](https://github.com/fusion809/zsh-theme) - Displays time & date, OS (including distro if on Linux), directory and whether running as root.
 - [horse-sh](https://github.com/emileswarts/horse-sh) - A very minimal brown/red ZSH theme.
+- [htb](https://github.com/Idan1993/zsh-htb-theme) - Inspired by the pwnbox on a HackTheBox machine. Includes decorators for user@host, IP address and the current directory.
 - [hub](https://gist.github.com/hub23/c226b1c77446e099f7684b0d21c6b22a) - Simple and clean, includes the return code of the last command executed.
 - [hug](https://github.com/xxninjabunnyxx/hug-zsh) - When you're working and need a hug. Includes `git` status.
 - [humbled](https://github.com/saravanabalagi/zsh-theme-humbled) - A clean and humble theme with left-aligned `condaenv`, `virtualenv` and `git` status. Requires [condaenv](https://github.com/saravanabalagi/zsh-plugin-condaenv) plugin.