Preamble - How to install software with cabal-install

file to edit: https://github.com/haskell/cabal-userguide/blob/main/src/preamble/04_how_to_install_software_with_cabal-install.md

## Brief Summary

This issue was added because of discussion on the initial content ideation issue (starting [here](https://github.com/haskell/cabal-userguide/issues/1#issuecomment-861881018)). This is an important subject, because users often do want to install software without having to understand anything about packaging software. This section should explain how to install software with the `cabal-install` cli.

## Resources

[Installing packages](https://cabal.readthedocs.io/en/3.4/installing-packages.html)
[The install command](https://cabal.readthedocs.io/en/3.4/installing-packages.html)