attempted to start adding quests

src/main/java/com/alttd/altitudequests/gui/BookGUI.java

@@ -0,0 +1,5 @@
+package com.alttd.altitudequests.gui;
+
+public class BookGUI {
+
+}

src/main/java/com/alttd/altitudequests/gui/GUI.java

@@ -0,0 +1,20 @@
+package com.alttd.altitudequests.gui;
+
+import net.kyori.adventure.inventory.Book;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.Inventory;
+
+import java.util.HashMap;
+import java.util.UUID;
+
+public interface GUI {
+    HashMap<UUID, GUI> GUIByUUID = new HashMap<>();
+
+    void open(Player player);
+
+    GUIAction getGuiAction(int slot);
+
+    Inventory getInventory();
+
+    Book getBook();
+}

src/main/java/com/alttd/altitudequests/gui/GUIAction.java

@@ -0,0 +1,7 @@
+package com.alttd.altitudequests.gui;
+
+import org.bukkit.entity.Player;
+
+public interface GUIAction {
+    void click(Player player);
+}