Renamed nbt package to general data package

src/main/kotlin/net/axay/kspigot/data/NBTDataLoader.kt

@@ -0,0 +1,26 @@
+package net.axay.kspigot.data
+
+import net.axay.kspigot.annotations.NMS_General
+import net.minecraft.server.v1_16_R2.NBTTagCompound
+import org.bukkit.craftbukkit.v1_16_R2.entity.CraftEntity
+import org.bukkit.craftbukkit.v1_16_R2.inventory.CraftItemStack
+import org.bukkit.entity.Entity
+import org.bukkit.inventory.ItemStack
+
+@NMS_General
+var Entity.nbtData: NBTData
+    get() {
+        val nbtTagCompound = NBTTagCompound()
+        (this as CraftEntity).handle.load(nbtTagCompound)
+        return NBTData(nbtTagCompound)
+    }
+    set(value) {
+        (this as CraftEntity).handle.save(value.nbtTagCompound)
+    }
+
+@NMS_General
+val ItemStack.nbtData: NBTData get() {
+    CraftItemStack.asNMSCopy(this).let {
+        return if (it.hasTag()) NBTData(it.tag) else NBTData()
+    }
+}