Porting to KSvg
For Plasma 6, we're porting all instances of `PlasmaCore.Svg`, `PlasmaCore.SvgItem`, and `PlasmaCore.FrameSvgItem` to their new drop-in replacements here in the KSVG repo. The classes in plasma-framework have been removed in https://invent.kde.org/frameworks/plasma-framework/-/merge_requests/852 and https://invent.kde.org/frameworks/plasma-framework/-/merge_requests/879.
Relevant Merge Requests to port to KSvg:
* https://invent.kde.org/frameworks/plasma-framework/-/merge_requests/787
* https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2959
* https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/3190
* https://invent.kde.org/plasma/plasma-desktop/-/merge_requests/1531
* https://invent.kde.org/plasma/kdeplasma-addons/-/merge_requests/391
* https://invent.kde.org/plasma/plasma-sdk/-/merge_requests/86
* https://invent.kde.org/plasma/kwin/-/merge_requests/4175
* https://invent.kde.org/plasma/kwin/-/merge_requests/4342
* https://invent.kde.org/plasma/kwin/-/merge_requests/4345
* https://invent.kde.org/plasma/kscreenlocker/-/merge_requests/151
* https://invent.kde.org/plasma/kscreen/-/merge_requests/222
* https://invent.kde.org/plasma/plasma-nm/-/merge_requests/255
* https://invent.kde.org/plasma/plasma-pa/-/merge_requests/185
* https://invent.kde.org/plasma/bluedevil/-/merge_requests/131
* https://invent.kde.org/plasma/plasma-nano/-/merge_requests/43
* https://invent.kde.org/plasma/plasma-welcome/-/merge_requests/85
* https://invent.kde.org/documentation/develop-kde-org/-/merge_requests/296
* https://invent.kde.org/libraries/kirigami-addons/-/merge_requests/108
Getting it through kdereview: https://invent.kde.org/frameworks/ksvg/-/issues/2
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