Support Arch Linux in install scripts

[Mattcrmx]

Is your feature request related to a problem? Please describe.
When trying to install the cairo vm with the install script, install.sh, I'm prompted with

Detected OS: Arch
Detected OS (linux: Arch Linux) is unsupported.
Please open an issue (PRs welcome ❤️) on:
    https://github.com/lambdaclass/cairo-vm/issues

This then proceeds to abort installation. I'd like this architecture to be supported, as it's likely that some members of the ecosystem actually use archlinux.

Describe the solution you'd like
Support Arch, likely by making a script with the appropriate pacman commands.

Thanks in advance !