feat(create): Allow all signs

Implements #18.

Author: Zoriot

src/main/java/com/alpsbte/plotsystemterra/core/plotsystem/PlotCreator.java

@@ -16,6 +16,7 @@
 import com.sk89q.worldedit.math.Vector2;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.regions.*;
+import com.sk89q.worldedit.world.block.BlockCategories;
 import org.apache.commons.lang3.StringUtils;
 import org.bukkit.*;
 import org.bukkit.block.Block;
@@ -337,7 +338,7 @@ private static boolean containsSign(@NonNull Polygonal2DRegion polyRegion, World
                 for (int k = polyRegion.getMinimumPoint().z(); k <= polyRegion.getMaximumPoint().z(); k++) {
                     if (!polyRegion.contains(BlockVector3.at(i, j, k))) continue;
                     Block block = world.getBlockAt(i, j, k);
-                    if (!block.getType().equals(Material.OAK_SIGN) && !block.getType().equals(Material.OAK_WALL_SIGN))
+                    if (!Tag.ALL_SIGNS.isTagged(block.getType()))
                         continue;
                     hasSign = true;