[23.2] Magres datatype addition

[Neonbluestoplight]

Supersedes #17423

Added support for Ab initio Nuclear Magnetic Resonance file format (Magres). These are needed for Nuclear Magnetic Resonance (materials science) use cases. Also moved ASE metadata output functionality to its own class (AtomicStructFile) for easier addition of future datatypes that make use of ASE for metadata.

See:
https://www.ccpnc.ac.uk/docs/magres

Targeting release 23.2 instead of 23.1 on recommendations of @martenson and @jdavcs. Also added description=" and description_url=" on recommendations from @bgruening.

cc @patrick-austin

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[jdavcs]

@Neonbluestoplight Thank you - everything looks good! Just one request: for the sake of a clean commit history, would you be able to get rid of the last commit (the merge commit) and, instead, rebase your commits onto an up-to-date version of release_23.2? If rebasing causes any issues, you can also simply git cherry-pick the 9 commits onto a clean branch based off of release_23.2. Please feel free to ping me - I'll be happy to help.

[martenson]

I rebased and encountered some issues so opening a clean PR in #17499

[martenson]

Thank you for the contribution @Neonbluestoplight !