Modify --pages option to copy pages files directly into WACZ

[tw4l]

Fixes #91

Adds tests as well. Happy to make any changes you see fit. Thanks for the review!

[matteocargnelutti]

Hi @tw4l -- thanks for the PR!

I'm on board with the idea 🏄

Here are two things I would suggest:

• --pages-dir should be a replacement of --pages, so we don't have two features behaving in almost identical ways. I'd suggest replacing the current --pages option with your feature.
• I would add some data validation in copyPagesFilesToZip() so we don't accidentally copy over an invalid pages.jsonl / extraPages.jsonl file. For example, I'd want to be "sure" it's a series of JSON objects, and that they match the spec.

What do you think?

[tw4l]

Hi @tw4l -- thanks for the PR!

I'm on board with the idea 🏄

Here are two things I would suggest:

* `--pages-dir` should be a replacement of `--pages`, so we don't have two features behaving in almost identical ways. I'd suggest replacing the current `--pages` option with your feature.

* I would add some data validation in `copyPagesFilesToZip()` so we don't accidentally copy over an invalid `pages.jsonl` / `extraPages.jsonl` file. For example, I'd want to be "sure" it's a series of JSON objects, and that they match the spec.

What do you think?

Those both make sense to me! Happy to push these changes tomorrow morning :)

[tw4l]

Good morning @matteocargnelutti !

I've gone ahead and made the changes, as well as checking for a .jsonl extension (case-insensitive) rather than checking for pages.jsonl and extraPages.jsonl specifically, to allow for future flexibility with pages filenames.

Let me know if anything!

[matteocargnelutti]

Thanks again for a great PR, @tw4l