Top/Bottom Panels Mode

[okyr-ux]

Please consider adding the possibility to arrange the two file panels one above the other (top/bottom), instead of only side-by-side (left/right). This is useful on portrait displays, or when working with long filenames.

Sorry if this was already requested before, I have done a search for similar discussions and didn't find anything.

Feature specifics:

1. Option to toggle between horizontal (side-by-side) and vertical (top/bottom) panel layouts via menu, command palette, or keyboard shortcut.
2. Remember the last used layout per window or globally.
3. Allow resizing the panels’ height (in vertical mode) with a draggable splitter.

Vertical panel layouts are available in several other dual-panel file managers:

1. Midnight Commander (macOS / *nix)
2. FAR Manager (Far2L is available for macOS)
3. Double Commander (available for macOS, this feature is called "Horizontal panels mode")
4. Wondows-only managers: Total Commander, Directory Opus, Altap Salamander,
5. Linux: Dolphin and maybe others

Adding this feature would make file management more flexible and ergonomic for different workflows and screen setups. Thank you for considering this enhancement!