[Request] Custom languages for Code Block

https://github.com/hunghg255/reactjs-tiptap-editor/blob/adf657fec2ca7b649ae8833ee20db116a7c22c2f/src/extensions/CodeBlock/CodeBlock.ts#L37

Hey, what are your thoughts on implementing support for custom languages for the new CodeBlock component, like we used to?

Similar to https://github.com/hunghg255/reactjs-tiptap-editor/issues/82