Ability to disable internal tools, see example 💡

Hi all,

It would be nice if we could disable internal tools via the config rather than having to forking and commenting out this bit of code https://github.com/codex-team/editor.js/blob/next/src/components/modules/tools.ts#L206-L210.

I've used the above mentioned approach to allow a `customParagraph` tool to bind to the `onPaste()` handler.

If there's a better way to do this, please let me know.

Thanks!