Make it easy to copy the version information of Tokodon

When I want to report a bug or feature for Tokodon, I would like to have it easy to copy the version information to paste into a bug report.

Basically, I would like to click one button and then be able to copy all information that is required

to report a bug here:

bugs.kde.org/enter_bug.cgi?product=Tokodon

Which is this:

SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version: