Allow customizing the ebook view

[csolisr]

It would be nice if the ebook view had more options for visualization, for example setting the default font type and size, being able to customize the text and background color (for example for a "night mode"), or setting the default width of the page. Before using this plugin, I used to use the Nextcloud Files Reader, which does support all the settings I detailed above, and given that it's open-source it should be technically possible to integrate their settings in this app.

[itegulov]

The ebook view is not a part of bookshelf plugin, but rather a part of mainstream jellyfin-web. So you are better off with creating an issue in jellyfin-web.