[NEW TOOL] Mac Address Converter

[SAENE]

What type of request is this?

New tool idea

Clear and concise description of the feature you are proposing

Hope there is a tool for MAC to generate EUI-64 IPV6 address

Is their example of this tool in the wild?

refer to this ：https://hostsailor.com/cn/macaddressconverter.php

Additional context

No response

Validations

• Check the feature is not already implemented in the project.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Check that the feature can be implemented in a client side only app (IT-Tools is client side only, no server).

[sharevb]

Hi @SAENE and @CorentinTh, implemented in #867