fix: aspect ratio

[arzola]

This PR sets the featured book card aspect ratio to be 3/4 to have a better cover visualization

[SteelWagstaff]

I don't think this quite gets us where we want to go. Here's an example where I have four covers of different sizes (800x1200px, 1039x1087, 800x800, and 1000x1500). Notice how content is cropped at bottom for images that have 1.5x ratio and at right for images with 1x ratio. Also notice how height of featured blocks differ when title text spans two lines.

Let me think a bit more on how we want this to function before proposing changes.

[arzola]

@SteelWagstaff I sent an update that I think it could work, the height of the titles are even and the background cover position is now centered for squared images (1:1) I mean I think there is no a perfect crop trying to fit squared images with portrait and landscape ratios but I think using 3:4 with a centered approach for the other ratios looks good enough

[SteelWagstaff]

LGTM!