"Autogenerate" data files with data fallbacks and moved keys folder into jar resources (#927)

* Autogenerate keys and data files

* Update gacha html files

Accidentally pushed with old html files

* Keys no longer copied. No more manually retrieving listing files. Recursive directory creation

Removed unused code from old GC as well.

* Moved somethings and better errors

* Fixed resources from loading twice

* Data files fallback

src/main/java/emu/grasscutter/utils/Utils.java

@@ -9,6 +9,7 @@ import java.time.temporal.TemporalAdjusters;
 import java.util.*;
 
 import emu.grasscutter.Grasscutter;
+import emu.grasscutter.data.DataLoader;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufUtil;
 import io.netty.buffer.Unpooled;
@@ -198,6 +199,9 @@ public final class Utils {
 		if(!fileExists(dataFolder))
 			createFolder(dataFolder);
 
+		// Make sure the data folder is populated, if there are any missing files copy them from resources
+		DataLoader.CheckAllFiles();
+
 		if(exit) System.exit(1);
 	}