reorganise readme badges

[bjlittle]

🚀 Pull Request

Description

This PR reorganises the README.md badges into the following:

[bjlittle]

@pp-mo

* [ ]  move 'ci-tests' to front of CI section, as I think its the most important entry

It is, but I've put them in alphabetical order, otherwise they're just random.

I agree ci-tests are important, but to be fair, they're not hard to find as-is.

* [ ]  sections order : put "community" under "repo", and "package" last (as it's effectively a download link reference).

The sections are ordered alphabetically, otherwise it's a bit random.

Once we agree on the CoC poll then the badge for that will go in the 💬 Community section, so I think it has relevance. Also, we could also add a link to the cf-units GH Discussions... infact I can do that one now.

* [ ]  actually I'm not sure about 'Community'.  If we had a code-of-conduct badge it could go there, but the DOI as we have it is version-specific : so _that_ could just go in 'package'.

For me, the community reference the DOI to cite us. That's my thinking on it, but happy to move it to the package :+1:

* [ ]  didn't we have a badge for "platform: agnostic" package type? -- would go in 'package' section (not in Meta)

cf-units isn't pure python, so isn't platform agnostic. It really does care about the platform and the chipset as we've got cythonized code wrappend around a C-library. So, I'm not sure what you mean :thinking:

* [ ]  include "imports: isort" in the Meta section -- this one seems to have disappeared, was there a reason for that ?

I'll re-add those :+1:

I'm a bit puzzled because I think it may have changed under my feet while I was writing some notes, but I can't quite see how !

[pp-mo]

cf-units isn't pure python

Sorry, don't quite know what I was thinking there.

[pp-mo]

Thanks @bjlittle , clearly an improvement !

[bjlittle]

@pp-mo Awesome, thanks :rocket:

[bjlittle]

@pp-mo when #350 lands then the ci-status badge will come to life (hopefully)