[BREAKING] Item Usage Overhaul

-De-hardcode elemental orb values
-De-hardcode exp items
-Change ShopChest format (temporary, drop system overhaul will replace it entirely)
-Food healing actually uses Ability data for real HP amounts

src/main/java/emu/grasscutter/data/binout/AbilityData.java

@@ -0,0 +1,13 @@
+package emu.grasscutter.data.binout;
+
+import java.util.Map;
+
+public class AbilityData {
+    public String abilityName;
+    public Map<String, AbilityModifier> modifiers;
+    public boolean isDynamicAbility;
+    public Map<String, Float> abilitySpecials;
+    // abilityMixins
+    // onAbilityStart
+    // onKill
+}