Add textures for "Song Items" (#22)

src/main/java/com/github/hhhzzzsss/songplayer/item/SongItemUtils.java

@@ -15,8 +15,12 @@ public class SongItemUtils {
     public static final String SONG_DATA_KEY = "SongData";
     public static final String FILE_NAME_KEY = "FileName";
     public static final String DISPLAY_NAME_KEY = "DisplayName";
+    public static final String MODEL_KEY = "CustomModelData";
 
     public static ItemStack createSongItem(ItemStack stack, byte[] songData, String filename, String displayName) {
+        NbtCompound songPlayerInitNbt = new NbtCompound();
+        songPlayerInitNbt.putInt(MODEL_KEY, new Integer("751642938"));
+        stack.setNbt(songPlayerInitNbt);
         NbtCompound songPlayerNbt = new NbtCompound();
         stack.setSubNbt(SONG_ITEM_KEY, songPlayerNbt);
         songPlayerNbt.putString(SONG_DATA_KEY, Base64.getEncoder().encodeToString(songData));

src/main/resources/assets/minecraft/models/item/paper.json

@@ -0,0 +1,13 @@
+{
+	"parent": "minecraft:item/generated",
+	"textures": {
+		"layer0": "minecraft:item/paper"
+	},
+	"overrides": [{
+			"predicate": {
+				"custom_model_data": 751642938
+			},
+			"model": "songplayer:item/song_item"
+		}
+	]
+}

src/main/resources/assets/songplayer/models/item/song_item.json

@@ -0,0 +1,7 @@
+{
+	"parent": "minecraft:item/generated",
+	"textures": {
+		"layer0": "minecraft:item/paper",
+		"layer1": "songplayer:item/song_item"
+	}
+}