PDFs not prioritized for full body text

[ewhanson]

Problem

When the full-body text is parsed in OJS, OJS prioritizes HTML file types but does no further sorting for the other file types. This can lead to cases where the next available filetype is technically parseable (i.e. a text file), but not an actual "article text" galley file. We should consider PDFs to be higher priority as they are likely to be the desired full-text galley files.

Solution

Galleys should be sorted according to the following hierarchy:

1. HTML files
2. PDF files
3. All other file types

TODO

• [ ] #63

[ewhanson]

PRs:

• stable-3_3_0: #60
• stable-3_4_0: #61
• main: #62