Add a hostname widget

[thassiov]

Is your feature request related to a problem? Please describe.
I need to ssh into my work computer and quite often don't have a clear indication of where am I (didn't want to add a indicator in my zsh $PS1 or my neovim status bar as I didn't find it quite right to do so). This hostname indicator solves this issue.

Describe the solution you'd like
Being able to add a simple widget informing me of the host's name. Adding this to my tmux config would be enough

set -g @tokyo-night-tmux_show_hostname 1

Describe alternatives you've considered
I saw another issue related to a similar feature, but it asked to username and hostname. I just wanted to add the hostname.
#95

Additional context

A screenshot of it: