refactor: Replace useClipboardCopy from dcl-gatsby

[ncomerci]

This closes #1050

[1emu]

I have some doubts about the naming

 return {
    copiedValue,
    copy,
    clear,
  }

The word copy could also refer to the copied value, so in some contexts it might not be entirely clear
(when we do const { copy } = useClipboardCopy(Time.Second) for example)

I think copyValue could be a slightly better name for the function, but I'm not against leaving it as it is.