Bukkit

Behavior changes to be aware of before updating:

- Home names are now unique per player without regard to case, so you can no longer create both `base` and `Base`. Homes you already have are untouched, including any existing duplicates.
- `/delete-home` now deletes a single home. Previously it deleted every home whose name matched, so a player with duplicate names lost all of them at once.
- The plugin now requires Java 21 to run (previously Java 9). Minecraft 1.21 servers already require Java 21, so most setups need no change.

- Added a home management menu: right-click a home in the homes GUI to rename it, move it to where you are standing, set its icon to the item you are holding, or delete it. Deleting asks for confirmation first, and renaming opens an anvil prompt for the new name.
- Added a "Right click to edit home" hint to homes in the list, shown only to players who are able to manage them.
- Added the `sh2.manage-homes` permission, which controls the management menu and defaults to granted.
- Added config keys for the management menu: `manageHomeTitle`, `renamePromptTitle`, `manageHomeHint`, `maxHomeNameLength`, the button item and name pairs, and the new success and error messages. See the example config above.
- Fixed home updates and deletes not being scoped to the owning player.