Update Scripts to use SF cli instead of SFDX cli

[JMercie]

New Feature Summary

I think would be nice to move to the new SF cli commands as Salesforce is continuously supporting and developing these new cli and commands usually run faster.

I think changes would just be necessary on a few of the pwsh scripts and the package.json scripts.

I can work on it if this feels like a good idea.

[jongpie]

@JMercie this sounds great to me - I've started using sf myself when doing development, so I think it makes sense to update this repo to use it too. In addition to the pwsh scripts & package.json scripts, there's also the file .github/workflows/build.yml that controls the GitHub pipeline. It looks like I have a few more sfdx commands being called within build.yml that could be update to sf commands instead.

I'd be happy to review & test a PR if you want to work on this. Thanks so much for all of the help!