Add "tile" support for wallpaper image position.

**Describe the enhancement or feature you'd like**
Love using this app. However I have wallpapers that are tiled & noticed that "tiled" isn't an option in `personalization > background > position` Would love to have this be an option in the future!

**Describe alternatives you've considered**
- Manually doing in in windows settings: Though this can be time consuming & it would be better to have it be automated.
- Or "let windows manage my theme" but I've heard about some users having their themes deleted in some circumstances. So I'd rather not risk it. It's been a while so I should look into this & see if that's still the case? If it's not a problem anymore I'll go for this until this feature gets added.

**Additional context**
In windows 11 you are able to choose a variety of "fits" for your selected wallpaper.

One of these is "tile" which as the name suggests tiles the selected image until it completely fills the desktop background. I think it would just be nice to have this added in to. I thought since the program almost has all the "fits" implemented why not add it? Especially since this "fit" option has been around for a long time on windows.

Start at the personalization > background > position setting and trace how the existing wallpaper fit options are represented and applied. Compare the available Windows 11 fits with the app's current options. Done means "tile" can be selected and the chosen wallpaper tiles across the desktop background.

Written by the indexing model from the issue text.