Refactor Carpet's sticky blocks code (#1505)

refactor sticky blocks code

src/main/java/carpet/fakes/BlockBehaviourInterface.java

@@ -0,0 +1,20 @@
+package carpet.fakes;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.state.BlockState;
+
+public interface BlockBehaviourInterface {
+
+    /**
+     * @return whether this block is sticky in any way when moved by pistons
+     */
+    public boolean isSticky(BlockState state);
+
+    /**
+     * @return whether the neighboring block is pulled along if this block is moved by pistons
+     */
+    public boolean isStickyToNeighbor(Level level, BlockPos pos, BlockState state, BlockPos neighborPos, BlockState neighborState, Direction dir, Direction moveDir);
+
+}