Fix website marketplace queries after logo -> logoUrl schema rename (#24695)

## Context

https://twenty.com/apps was broken: the apps grid rendered empty and
every `/apps/[slug]` detail page returned a 404, even though
`packages/twenty-website/src/app/[locale]/(site)/apps/[slug]/page.tsx`
hadn't changed.

The root cause is a server-side schema change: the public marketplace
API renamed `logo` to `logoUrl` on both `MarketplaceApp` and
`MarketplaceAppDetail`, and replaced `screenshots` with `galleryImages`
on the detail type. The website's GraphQL queries still requested the
old field names, so the live API rejects them with `Cannot query field
"logo" on type "MarketplaceApp"`. `fetchMarketplaceApps` swallows the
error and returns `[]`, which empties the grid and makes
`fetchMarketplaceAppDetailBySlug` return `null` for every slug, so the
page calls `notFound()`.

## What this PR does

- `fetch-marketplace-apps.ts`: query `logoUrl` instead of `logo` and map
it accordingly.
- `fetch-marketplace-app-detail.ts`: query `logoUrl` instead of `logo`
and `galleryImages` instead of the deprecated `screenshots`.

Both corrected queries were verified against the live
`https://api.twenty.com/metadata` endpoint and return full data.
Typecheck and lint pass for `twenty-website`.

---
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