[Module][v6.x][Update] MyNexoPOS: Ability to update modules from the dashboard

As same as the module helps updating NexoPOS,
We should be able to update the module from the dashboard as well.

We need to clarify the license attribution matter to an installation.

Matters:
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- Does an item be downloaded at multiple installations?
- Should we restrict single license per installation?
- Should we update the attached domain and only allow updates from that domain?