use better portable shebang in scripts

[ttytm]

Thanks for the work on this server.

I was running into a small issue of not being able to directly run the script due to bash not being in the path specified by the shebang.

The PR updates the shebang to make it more portable across systems and uses a uniform shell - atm. some scripts specify sh while others use bash.

[matatonic]

Thanks for this, but... What environment were you using that /usr/bin/env exists but /bin/sh or /bin/bash doesn't?

[ttytm]

Thanks for this, but... What environment were you using that /usr/bin/env exists but /bin/sh or /bin/bash doesn't?

Thanks for tackling this @matatonic.

I'm using NixOS.

openedai-speech on  update-shebang [!?] via 🐍 v3.12.7 took 4m33s 
❯ which bash
/run/current-system/sw/bin/bash

openedai-speech on  update-shebang [!?] via 🐍 v3.12.7 
❯ which sh
/run/current-system/sw/bin/sh

BSD variants would be another destination that might not have #/bin/<shell> paths available.

As a reference an article that contains additional aspects regarding the portability of the shebang:
https://www.cyberciti.biz/tips/finding-bash-perl-python-portably-using-env.html

[matatonic]

NixOS, nice! I'll update this in the next release, thanks again.