186 vignette detailing other spc options

[ThomUK]

• [ x] added unit tests and checked code coverage with covr::report() (should aim for 100%)
• [ x] ran devtools::document()
• [ x] ran lintr::lint_package() and resolved all lint warnings and notes
• [ x] ran styler::style_pkg() to make sure code matches the style guidelines
• [ x] ran R-CMD CHECK and resolved all issues

This closes #186 by adding some explanation about options for PowerBI and other tools.

I get a note on CMD-CHECK, but I don't think it's a serious one: ❯ checking package dependencies ... NOTE Packages suggested but not available for checking: 'hexSticker', 'spelling'

[tomjemmett]

was the note local? I'm not getting it, and not seeing on the checks run by actions. You may need to locally install these packages?

[ChrisBeeley]

Thanks @ThomUK this is great