Option to add horizontal separators in Book and Chapter views

[Wookbert]

Describe the feature you'd like

If a book has many pages it becomes visually challenging to oversee the page titles. Chapters do part of the job, but if one’s looking already at a pages of a chapter.

The idea is to be able to drag in horizontal separators to visually group certain pages. To get a better idea, here’s a before & after:

Before

After

Note the horizontal separators. Also the height of the gaps between the page titles has been reduced by 20 px.

Describe the benefits this would bring to existing BookStack users

Better legibility, faster navigation. Think of the blank pages inside a paper book

Can the goal of this request already be achieved via other means?

Sub-Categories might be an alternative path, but IMO it potentially adds more clutter.

Have you searched for an existing open/closed issue?

• [X] I have searched for existing issues and none cover my fundemental request

How long have you been using BookStack?

1 to 5 years

Additional context

I chose not to draw lines within the white page background, but instead to „break separate“ the white page background. IMO this is less cluttering and cleaner, due to the disturbance the blue/orange vertical lines in front of the pages/chapters already create.