changed pixelblock item and added item to recipe book

src/main/java/eu/mhsl/minecraft/pixelblocks/listeners/DiscoverRecipesListener.java

@@ -0,0 +1,26 @@
+package eu.mhsl.minecraft.pixelblocks.listeners;
+
+import eu.mhsl.minecraft.pixelblocks.PixelBlockItem;
+import eu.mhsl.minecraft.pixelblocks.PixelBlocksPlugin;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.*;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.List;
+import java.util.logging.Level;
+
+public class DiscoverRecipesListener implements Listener {
+    @EventHandler
+    public void shouldDiscover(InventoryClickEvent event) {
+        ItemStack clickedItem = event.getCurrentItem();
+        if(clickedItem == null) return;
+        if(!List.of(Material.HEART_OF_THE_SEA, Material.GLOW_BERRIES).contains(clickedItem.getType())) return;
+        if(!(event.getWhoClicked() instanceof Player player)) return;
+        if(player.hasDiscoveredRecipe(PixelBlockItem.recipeKey)) return;
+        PixelBlocksPlugin.plugin.getLogger().log(Level.INFO, String.format("%s unlocked tne PixelBlock recipe!", player.getName()));
+        player.discoverRecipe(PixelBlockItem.recipeKey);
+    }
+}