document the LimitError constructor

Author: matmen

src/util/limits.ts

@@ -4,6 +4,15 @@
 export class LimitError extends RangeError {
     /** `'LimitError'`: tells a limit apart from other `RangeError`s */
     override name = 'LimitError';
+
+    /**
+     * Creates the error (ImageScript throws it, there's no need to create one)
+     * @param message Which limit was exceeded, and by what
+     * @param options The error's `cause`, like `Error`'s
+     */
+    constructor(message?: string, options?: ErrorOptions) {
+        super(message, options);
+    }
 }
 
 /** The default of the decode options' maxPixels: 16383 squared (like sharp's limitInputPixels) */