Asura hide cover

[Naputt1]

Checklist:

• [x] Updated extVersionCode value in build.gradle for individual extensions
• [x] Updated overrideVersionCode or baseVersionCode as needed for all multisrc extensions
• [x] Referenced all related issues in the PR body (e.g. "Closes #xyz")
• [x] Added the isNsfw = true flag in build.gradle when appropriate
• [x] Have not changed source names
• [x] Have explicitly kept the id if a source's name or language were changed
• [x] Have tested the modifications by compiling and running the extension through Android Studio
• [x] Have removed web_hi_res_512.png when adding a new extension

[AwkwardPeak7]

why? one extra page isn't a big deal. besides, this work under the assumption the first page will always be the "cover page", which may or may not remain true in the future.

[Naputt1]

It's optional so you just have to turn it off the they decided the move the "cover page".

[Amejonah1200]

Instead on relying on only the position, why not taking the size into account? Banners usually are horizontal while pages themselves are vertical.

[vetleledaal]

The cover is unique and containts its own chapter number. I don't think it should be removed.

If any, you should hide the last page (/images/EndDesign.webp). If you want to implement that please open another PR. You can implement this without a user-facing option/preference.