wallpapers/image: add wide image provider
This provider will be used to provide the cropped wide wallpaper for each screen.
FEATURE: 393781 FIXED-IN: 5.26
Requires https://invent.kde.org/frameworks/plasma-framework/-/merge_requests/548
| 1024x768 + 1920x1080 | 1920x1080 + 1920x1080 |
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| 1920x1080 1920x1080 |
Random |
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Edited by Fushan Wen