Updates for files in fuji and guadalupe

[weaverba137]

This PR includes at least placeholder data models for all FITS files in fuji and guadalupe.

Some data model files describe file types other than FITS. I have verified that for now the data model verification will only examine FITS files.

For future use: the file type is automatically identified, and a warning is issued if the file type is missing, or if it is an unrecognized type.

I'd like to get this merged relatively soon, so people working on individual data model files will be able to create up-to-date branches for their work. However, I want to do some more tests of the verification code before merging. This might result in changes to some of the regular expressions used to identify files.

So please review, but do not merge immediately.

[coveralls]

Coverage increased (+3.6%) to 100.0% when pulling 6a688af on fuji-guadalupe into 2a7994d on main.

[weaverba137]

@sbailey, I'm still slogging away at things like missing (possibly optional) keywords in fuji and guadalupe. In terms of code development however, I think it's very close to time to merge. Could you please go ahead and review, to the extent that's possible?

To summarize:

• Implements different visual style for header keyword tables vs. data tables #100, collapsable sections for header keyword tables #99, Support "see other" functionality at HDU level #89, Optional HDUs and table columns #86.
• Exception: I haven't found enough examples of missing/optional HDUs to implement that, so I'll punt that to another issue/PR.
• fuji-guadalupe on ReadTheDocs to see how it actually looks in rendered form.

[weaverba137]

Late-breaking news: the notation char[*] in place of e.g. char[7] to denote an arbitrary-length string, will also be implemented.

[geordie666]

@weaverba137: Later in the week I want to start updating the data model for the target files. Is the intention to merge this branch relatively soon? Or should I branch off fuji-guadulupe instead of main to make my updates?

[weaverba137]

@geordie666, I will get back to you shortly about that.

[weaverba137]

OK, merging now.