[Feature Request] Add preview image UI in the manga's detail page

[IceAsteroid]

Describe your suggested feature

[Feature Request]Add preview image UI in the manga's detail page

Hi, good day, everyone!

---

It would be nice if there's a first-level button in the manga's detailed page to show all the preview images of the visited manga.

The "preview image" UI could show images in grid-style view, including the option to adjust the column of grid, for better flexibility in different screen sizes.

When the user is in the reader UI to read the manga, the "preview image" UI should also be able to launch, probably as a button along in a row where "View chapters", "Open in WebView", "Crop borders" are at in the reader UI.

---

Why this is useful:

There are some scenarios where the user may browse through the source and doesn't know which exact comic to read in detail. The "preview image" UI would help this for better browsing through a particular manga's content briefly by clicking the "preview image" button to show up the UI listing images showin in grid, without getting into the reader and scrolling in inconveniently, since each image shown in reader are large and filled in the screen.

Other details

No response

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
• I have written a short but informative title.
• If this is an request for a feature in the original Tachiyomi, I am opening because multiple versions of TachiyomiJ2K have been released without this feature.
• If this is an issue with an extension, or a request for an extension, I should be opening an issue in the extensions repository.
• I have updated the app to version 1.7.4.
• I have checked through the app settings for my feature.
• I have admitted that I am a clown by having checked this box, as I have not read these acknowledgements.
• I will fill out all of the requested information in this form.