fix: Helper#getConfigResource is not implemented correctly.

src/main/java/io/ib67/sfcraft/util/Helper.java

@@ -95,8 +95,9 @@ public class Helper {
 
     @SneakyThrows
     public static Optional<String> getConfigResource(Path root, String resource) {
-        if (Files.exists(root)) {
+        var r = root.resolve(resource);
-            return Optional.of(Files.readString(root.resolve(resource)));
+        if (Files.exists(r)) {
+            return Optional.of(Files.readString(r));
         }
         return Optional.empty();
     }