uno is now obtainable via wandering trader

right now its guaranteed from every trader for 15 emeralds, but i might change that sometime idk
its not like its all that important since its literally just a deck of cards

src/main/java/net/awakaxis/uno/mixin/WanderingTraderMixin.java

@@ -0,0 +1,34 @@
+package net.awakaxis.uno.mixin;
+
+import net.awakaxis.uno.UNOBlocks;
+import net.awakaxis.uno.UNOItems;
+import net.awakaxis.uno.item.UnoCardItem;
+import net.minecraft.world.entity.npc.WanderingTrader;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.Items;
+import net.minecraft.world.item.trading.MerchantOffer;
+import net.minecraft.world.item.trading.MerchantOffers;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(WanderingTrader.class)
+public abstract class WanderingTraderMixin {
+
+    @Inject(method="updateTrades", at=@At("RETURN"))
+    private void appendUnoCard(CallbackInfo ci) {
+        WanderingTrader wanderingTrader = (WanderingTrader) (Object) this;
+
+        MerchantOffers merchantOffers = wanderingTrader.getOffers();
+
+        MerchantOffer unoCardOffer = new MerchantOffer(
+                new ItemStack(Items.EMERALD, 15),
+                ItemStack.EMPTY,
+                UNOBlocks.CARD_DECK.asItem().getDefaultInstance(),
+                1, 5, 0.05f
+        );
+
+        merchantOffers.add(unoCardOffer);
+    }
+}

src/main/resources/uno.mixins.json

@@ -1,10 +1,11 @@
 {
-	"required": true,
-	"package": "net.awakaxis.uno.mixin",
-	"compatibilityLevel": "JAVA_17",
-	"mixins": [
-	],
-	"injectors": {
-		"defaultRequire": 1
+  "required": true,
+  "package": "net.awakaxis.uno.mixin",
+  "compatibilityLevel": "JAVA_17",
+  "mixins": [
+    "WanderingTraderMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
 	}
 }