Create files from Grasscutter-Quests

these files are NOT directly compatible with Grasscutter, and require additional modifications to the codebase to work.

src/main/java/emu/grasscutter/game/player/PlayerProgress.java

@@ -0,0 +1,63 @@
+package emu.grasscutter.game.player;
+
+import dev.morphia.annotations.Entity;
+import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.val;
+
+import java.util.Map;
+
+/**
+ * Tracks progress the player made in the world, like obtained items, seen characters and more
+ */
+@Entity
+public class PlayerProgress {
+
+    @Getter private Map<Integer, ItemEntry> itemHistory;
+
+    // keep track of EXEC_ADD_QUEST_PROGRESS count, will be used in CONTENT_ADD_QUEST_PROGRESS
+    // not sure where to put this, this should be saved to DB but not to individual quest, since
+    // it will be hard to loop and compare
+    private Map<Integer, Integer> questProgressCountMap;
+
+    public PlayerProgress(){
+        this.questProgressCountMap = new Int2IntOpenHashMap();
+        this.itemHistory = new Int2ObjectOpenHashMap<>();
+    }
+
+    public boolean hasPlayerObtainedItemHistorically(int itemId){
+        return itemHistory.containsKey(itemId);
+    }
+
+    public int addToItemHistory(int itemId, int count){
+        val itemEntry = itemHistory.computeIfAbsent(itemId, (key) -> new ItemEntry(itemId));
+        return itemEntry.addToObtainedCount(count);
+    }
+
+    public int getCurrentProgress(int progressId){
+        return questProgressCountMap.getOrDefault(progressId, -1);
+    }
+
+    public int addToCurrentProgress(int progressId, int count){
+        return questProgressCountMap.merge(progressId, count, Integer::sum);
+    }
+
+    @Entity
+    @NoArgsConstructor
+    public static class ItemEntry{
+        @Getter private int itemId;
+        @Getter @Setter private int obtainedCount;
+
+        ItemEntry(int itemId){
+            this.itemId = itemId;
+        }
+
+        int addToObtainedCount(int amount){
+            this.obtainedCount+=amount;
+            return this.obtainedCount;
+        }
+    }
+}