Add car harness image to "In the Box" section

[ugtthis]

• made the "In the box" section have the optional harness
• switched to grid so that it is either a 2x2 grid or stacked versus having a widow item for certain screens sizes
• also fixes items to be centered when they are stacked as seen in 2nd vid

Different screen sizes

added-harness.mp4

Fixes items to be centered when mobile

[ugtthis]

Seems like the preview is failing because not enough channels
https://github.com/commaai/website/actions/runs/19694272857/job/56416086714

"message": "Couldn't create channel on `projects/959079472803/sites/comma-web`: channel quota reached.",
"status": "RESOURCE_EXHAUSTED"

[github-actions]

deployed preview: https://comma-web--pr253-pp20jm3q.web.app

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• mark your PR as a draft until it's ready to review
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[sshane]

Fixes items to be centered when mobile

this is a separate PR!

[sshane]

optional sounds like you don't need it at all. you can maybe add it if the user selects a harness dynamically

[sshane]

Seems like the preview is failing because not enough channels

yeah, I lowered the exp time, it should improve soon. can't delete in their UI

[ugtthis]

Sounds good, I'll make these separate PRs. Added the fix to center items #258 for now