Request for flatpak distribution support

[SalimTerryLi]

Problem description

Crashed into the exactly same issue as #816, on Mint 21. So I've made a flatpak one to overcome the many problems that AppImage raises: https://github.com/SalimTerryLi/flathub/tree/plotjuggler

May I ask if @facontidavide willing to take over the maintenance of that branch and send it to flathub, or just let me do the redistribution?

Kindly please check if there's any branding or license issue (such as AppID/URI)