introduce GameManager

Author: Kaleidox

src/main/java/org/comroid/api/text/WrappedCharSequence.java

@@ -0,0 +1,21 @@
+package org.comroid.api.text;
+
+import org.jspecify.annotations.NonNull;
+
+public interface WrappedCharSequence extends CharSequence {
+    @Override
+    default int length() {
+        return toString().length();
+    }
+
+    @Override
+    default char charAt(int index) {
+        return toString().charAt(index);
+    }
+
+    @Override
+    @NonNull
+    default CharSequence subSequence(int start, int end) {
+        return toString().subSequence(start, end);
+    }
+}