Add a loadReader helper function to DataLoader

Also minor name changing on a few DataLoader methods

src/main/java/emu/grasscutter/data/DataLoader.java

@@ -8,7 +8,9 @@ import emu.grasscutter.utils.Utils;
 
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.nio.file.Path;
 import java.util.List;
 
@@ -27,6 +29,24 @@ public class DataLoader {
     public static InputStream load(String resourcePath) throws FileNotFoundException {
         return load(resourcePath, true);
     }
+    
+    /**
+     * Creates an input stream reader for a data file. If the file isn't found within the /data directory then it will fallback to the default within the jar resources
+     *
+     * @param resourcePath The path to the data file to be loaded.
+     * @return InputStreamReader of the data file.
+     * @throws IOException
+     * @throws FileNotFoundException
+     * @see #load(String, boolean)
+     */
+    public static InputStreamReader loadReader(String resourcePath) throws IOException, FileNotFoundException {
+        try {
+            InputStream is = load(resourcePath, true);
+            return new InputStreamReader(is);
+        } catch (FileNotFoundException exception) {
+            throw exception;
+        }
+    }
 
     /**
      * Load a data file by its name.
@@ -49,7 +69,7 @@ public class DataLoader {
         return null;
     }
 
-    public static void CheckAllFiles() {
+    public static void checkAllFiles() {
         try {
             List<Path> filenames = FileUtils.getPathsFromResource("/defaults/data/");
 
@@ -58,16 +78,16 @@ public class DataLoader {
             } else for (Path file : filenames) {
                 String relativePath = String.valueOf(file).split("defaults[\\\\\\/]data[\\\\\\/]")[1];
 
-                CheckAndCopyData(relativePath);
+                checkAndCopyData(relativePath);
             }
         } catch (Exception e) {
             Grasscutter.getLogger().error("An error occurred while trying to check the data folder.", e);
         }
 
-        GenerateGachaMappings();
+        generateGachaMappings();
     }
 
-    private static void CheckAndCopyData(String name) {
+    private static void checkAndCopyData(String name) {
         String filePath = Utils.toFilePath(DATA(name));
 
         if (!Utils.fileExists(filePath)) {
@@ -93,7 +113,7 @@ public class DataLoader {
         }
     }
 
-    private static void GenerateGachaMappings() {
+    private static void generateGachaMappings() {
         if (!Utils.fileExists(GachaHandler.gachaMappings)) {
             try {
                 Grasscutter.getLogger().info("Creating default '" + GachaHandler.gachaMappings + "' data");