Feat(global): Add blurred image placeholders for all images loaded from Supabase.

[alexhosp]

To Do:

• [ ] Install the plaiceholder library
• [ ] In data.ts, where all data is fetched, add a function that creates base64 blur images for each imageUrl and adds it to the return data object.
• [ ] Add the blurred placeholder images to the Image component using the placeholder and blurDataUrl props.

Requirements:

• [ ] No layout shift while waiting for images to load.