Add a "Reverse" command to the "Order" menu

[Keavon]

Add a "Reverse" command to the bottom of this menu:

• If multiple noncontiguous ranges are present with the same direct parent (they're siblings in the nesting hierarchy), all the selected items should be swapped as part of the same list: [1], [2], 3, 4, [5], [6] should become [6], [5], 3, 4, [2], [1] (where [] indicates selection).
• If any selected layer has a selected ancestor, only the ancestor is considered selected and all children/descendants are ignored as part of the selection.
• If there are separate sets of selected sibling layers, and they aren't descendants of any selected layer, each set gets reversed independently as part of its own sibling set.
• Any selected layer without at least one other selected sibling is ignored.

So in summary, reversal happens for each set of selected siblings, but not those with selected ancestors.

[tarunprabhu11]

Can i get a check to make sure I am moving in the right direction please.

[Yash-g2310]

hey @Keavon !
i am new to opensource contribution and currently learning rust,
can i work on this issue?
also i have set up the codebase

[Keavon]

Hi @Yash-g2310, it looks like @tarunprabhu11 just opened a PR for this, but I can help you find another task to begin with if you join our Discord server and ask in the #development channel for a first task suggestion. See you there.