Limit logo and vehicle images to 400px

[Daniiiil1]

Summary

• add an optional maximum image dimension to the shared image picker
• resize JPEG, PNG, and WebP uploads in the browser while preserving aspect ratio
• apply a 400 px limit to vehicle and logo images without enlarging smaller files

This prevents oversized custom branding images from being stored and rendered by BlueOS.

Closes #3987

Validation

• corepack yarn --cwd core/frontend lint
• corepack yarn --cwd core/frontend build

[patrickelectric]

we probably should use browser-image-compression over doing all this.

[rafaellehmkuhl]

I would suggest investigating if 400px is the correct number, taking 4K screens into consideration. The way that I see, the main problem is not the resolution/dimensions, but the image size, aspect ratio, and the way it's being rendered.