Portal Frame Item

Added

• endPortal.eyeMode config: place End Portal frames EMPTY, RANDOM (10% chance per frame, as in strongholds) or ALL_BUT_ONE (default). Use EMPTY for packs with End Remastered.
• endPortal.giveEyeOnPlace config (default true): whether placing an End Portal gives the player one Eye of Ender.

Changed

• The Eye of Ender goes to the now empty hand, then the inventory, and drops at your feet if both are full instead of being lost.
• The End Portal placement preview shows empty frames and lines up correctly when aiming at grass or other replaceable blocks.
• Placement previews work from the off hand.
• Portal items respect adventure mode, spawn protection and claim mods.
• The failed ignition message is sent to the player who lit the portal, one line every two seconds, and every line after §n is shown.
• License is now GPL-3.0-or-later.

Fixed

• Placement previews leaked render state, which could leave other rendering translucent or misplaced.