Prepare 0.5 release

[ericpre]

xref https://github.com/hyperspy/rosettasciio/blob/main/releasing_guide.md

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.33%. Comparing base (e921e77) to head (de825c2).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #275 +/- ## ======================================= Coverage 86.33% 86.33% ======================================= Files 83 83 Lines 10672 10672 Branches 2331 2331 ======================================= Hits 9214 9214 Misses 939 939 Partials 519 519 ```

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[jlaehne]

Shouldn't we start having patch releases?

[ericpre]

Good question: at the moment, all releases contained new features and bug fixes - as it is the case for this one. By the nature of rosettasciio (most readers/writers are independent from each other, new features are usually small and isolated), I suspect that most of the time, we will not need patch release in the interest of making them available quickly and that patch release may not be worth the effort (using a bugfix/patch branch, doing backport or merging bugfix/patch regularly into main, etc.). Patch release containing bug fixes only would be useful to keep something into main for longer time (substantial changes that would be a bit of monitoring from the developers), but I suspect that it would be rare and possibly part of a major release.

[ericpre]

I can open a discussion on this later today, if someone doesn't get to it before me! 😃