LibWeb/WebIDL: Implement 'write' operation for ArrayBufferView

Author: https://github.com/shannonbooth
Commit: 3d3c1d8bf7
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3014
Reviewed-by: https://github.com/kennethmyhra ✅

Libraries/LibWeb/WebIDL/Buffers.h

@@ -69,6 +69,7 @@ public:
     using BufferableObjectBase::is_typed_array_base;
 
     u32 byte_offset() const;
+    void write(ReadonlyBytes, u32 starting_offset = 0);
 };
 
 // https://webidl.spec.whatwg.org/#BufferSource