double-doors-lite

Added

• Initial release of Double Doors Lite.
• Open or close a door by hand and the door directly beside it (its left/right neighbour) mirrors it — adjacent doors now behave like a real double door, swinging apart on opposite hinges.
• Works on wooden and copper doors, whether they face the same way or opposite ways. Iron (redstone-only) doors are left untouched.
• Predicted, same-tick syncing so both leaves move together with no lag; only the direct neighbour responds (no runaway chains).
• Server-side and lightweight — no items, no recipes, no config. Works in singleplayer and on servers.

Notes

• For Minecraft 26.2 on Fabric and NeoForge. Fabric requires Fabric API.