Feature Request: Vertical (Height) management for Claims

[EthannSchneider]

Hello,

First, thank you for your work on this plugin — it is very complete and flexible.

I would like to ask if it is possible (or planned) to support vertical claim (Y-level / height restriction).

Currently, claims are chunk-based, meaning they protect the full vertical column from bottom to top of the world.
However, in some server setups, this behavior is not ideal.

Use case

On my server, I use a sky island system where each player has their own floating island.

In this situation, I would like players to:

• Claim only their island area
• NOT claim everything below or above it (void, underground, or other builds)

Right now, claiming a chunk also protects:

• The entire vertical space below the island
• The entire vertical space above the island

This can cause issues if:

• There are multiple layers of islands
• There are builds below (e.g. caves, other players, or shared areas)

[retribyte]

Even being able to set global limits for claims would be helpful, e.g. claims are ignored below sea level (Y=62). It's really frustrating for players to be unable to explore caves or structures below ground just because someone has a base on the surface.