codeSplitters: show framework logos instead of words in the "Its apps" list #628

On a repo's fit panel, the Its apps: list (apps/codesplitters/src/client.html:2017) names each app's stack in words: "Vite + React, TypeScript", "Cloudflare Worker, TypeScript", "no framework, TypeScript". The words wrap onto a second line and are hard to scan.

Show each framework's own small logo instead, taken from the official press or brand kits, for a cleaner and more official look:

• Vite, React, TypeScript, Cloudflare Workers, Bun, and whatever else the detector reports
• the framework's name as the title / alt text, so hovering and screen readers still get the words
• fall back to the word when there's no logo
• check each brand's usage rules (sizes, colors, no changes), and use mono versions if the color ones clash with the B&W + orange palette

Raised by the owner while testing #609; not urgent.

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